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Find cheap flights from Seattle to Cambridge from $236

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Cambridge departing on 11/20. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 6/29
Sat 7/6

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Cheapest flight

$236
Flight from Seattle to London Heathrow Airport

When to book flights from Seattle to Cambridge

Are your dates flexible? Find out the best times to travel from Seattle to Cambridge based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from Seattle to Cambridge

  • Which airports will I be using when flying from Seattle to Cambridge?

    When flying out of Seattle you’ll be using Seattle/Tacoma Intl. Cambridge does not have its own airport so you’ll be flying into nearby London All airports airport, which is 49.3 mi away.

  • How long does a flight from Seattle to Cambridge take?

    Direct flights cover the 4,790 miles separating Seattle and Cambridge in about 9h 20m.

  • How many flights are there between Seattle and Cambridge?

    20 direct flights run between Seattle and Cambridge on a daily basis. On average, there are about 140 departures each week.

  • What’s the cheapest day of the week to fly between Seattle and Cambridge?

    Consider leaving on a Monday and avoid Fridays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Tuesdays and the most expensive ones on Wednesdays.

  • How does KAYAK find such low prices on flights from Seattle to Cambridge?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Cambridge.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Cambridge?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Cambridge from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Cambridge?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Cambridge with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Cambridge?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Cambridge from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Seattle to Cambridge?

    In the last 72 hours, the cheapest one-way ticket between Seattle and Cambridge found on KAYAK was with Icelandair for $236. Icelandair offered a round-trip connection from $578 and American Airlines from $579.

See more FAQs

Top tips for finding cheap flights from Seattle to Cambridge

  • There is no airport in Cambridge. Instead, you’ll be flying into London All airports when flying between Seattle and Cambridge.
  • The cheapest flight from Seattle to Cambridge was found 7 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is November.
See more tips

Top 5 airlines serving Seattle to Cambridge

 
Need help choosing which airline to fly with from Seattle to Cambridge? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10457 reviews
7.9Comfort
8.6Crew
7.4Food
8.0Entertainment
8.2Boarding
Airline reviews

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

10.0 ExcellentSash, May 2024SEA - HNL
Read more about Delta reviews

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

The flight crew was amazing. I’m very tall and they moved me to an exit row unsolicited!!! Amazing service.

Cabin crew on our flight showed lack of any customer service gruff and acting annoyed if you asked anything and I mean anything Example a man on the seat over dropped his beer on my husbands blanket We asked if we could switch out blankets cabin crew Said. No we don’t have any extras OK well can you take the wet one Cabin crew looked disgusted and annoyed Took it no OK or yes just a growl

Quick flight. But cabin crew were very noisy and talking too much, especially when we were seated at the back of the plane trying to sleep through the night .

My ticket was for Premium Economy and all the seats were taken, I was placed in Economy class and I’m looking for a refund.

Unfortunately delayed 2 hrs due to faulty tyre.. which had to be changed, but better safe than sorry.

The delay was an issue. Other than that. Every thing good

Hi vergin Atlantic service was good but the flight ticket agent travel up charge me extra 57 pounds as a airport charges, actually I refuse to pay but they say if I not pay £57 then they say you will not be able to travel from Heathrow to goa ,so for me there was no option and it was just 3 day before my departure so i paid, so please look in to the matter. And I have a receipt of £ 57 as well .thanks

Staff didn’t check cabin well for landing seemed more interested in chatting to each other. Food was poor and differed from pre order.

We were in the last group to be called to the flight - which was 30 minutes late taking off. While we were lucky enough to have been given bulkhead seats (due to a medical condition I’d told them about beforehand) the seats weren’t particularly comfortable. A crying baby for the whole trip made things worse, so the crew managed very well with coping. The final thing I’d say was that there wasn’t enough food served during the flight.

We flew Upper Class from London to The Turks and Caicos. Check in was amazing. Our ldriver too us directly to a special entrance to terminal 3. It took 10 minutes to check in and clear customs. Amazing! The VA lounge is large and comfortable. Boarding the flight was easy and without a wait. The crew was excellent. But the seats were awful, strange and uncomfortable. Having a comfortable flat bed seat is the reason we pays 1000s extra. The VA 787 uses a reverse herringbone configuration. Look it up. You have your back to the window and are facing the aisle with no privacy. Turning the seat into a bed requires assistance from the crew so not very spontaneous. . The food was ok. A bit tasteless and meager portions. Had to pay for WiFi. I believe VA has other configuration on their dream airbus flights. Lots of stuff about all this on YouTube where you can see what I have been describing. I can not recommend taking VA on a long flight with these seats.

From the start everything was perfectly fine. First meal was fantastic. Breakfast needs a lot of work and food was overcooked and not very nice for breakfast. Staff were fantastic friendly nice they came round and check we need anything else to eat or drink

Ability to select seating would be nice. We were family of three and they had us seated back to back and one of us on the other side of the plane??? That is pretty goofy. Especially when tickets were placed two months in advance.

We had a seat that would not function. No Wifi or inflight entertainment was available. Food was very poor. Attendants were very accommodating and apologized for the problems.

My son and I are 193 cm tall. We had reserved and paid for seats with extra leg room towards the front of the cabin. The day of the flight, we learned that Iberia had changed aircraft. We were assigned regular seats way back in the cabin. When we landed from our first leg we spoke with agents at the gate and we were told that they couldn’t improve our seats because the flight was full.

I am quite satisfied. The flight was on time and landed early. Staff was friendly.

Overall was good except for the seat which, for an 8 hour intercontinental flight, was uncorfortable. For that kind of flight seats should have more space, even for economy seats.

Needed more info on connecting flight. Late flight made very short connection. Lost luggage that we still do not have!

Seats comfortable on economy plus and attendants very helpful. Food was ok. Bathrooms needed servicing.

Original flight was cancelled - After waiting 2 hours for new take-off times. Then had to stand in line for 3 hours, ending at 2:30 am - to be told, " No hotel rooms anywhere in Dallas". No way for me to get any rest at DFW at that time of night.

I liked the friendly crew and desk staff, all very helpful. I was surprised and a little annoyed on my outbound flight from LGW to MCO as I had prepaid and booked my seat, which was all correct at check in on my boarding pass. when I got on the plane someone was in my seat ! I was moved to another seat. The food choice is quite limited and I feel that an option of a muffin for breakfast snack would be welcomed, not everyone wants egg or bacon wrap. The choice of entertainment is good, plenty to keep you busy on a long haul flight. I liked the option offered to have the cabin bag checked into the hold, it saved me as an older, lone traveller lifting my case into the overhead locker or finding there was no space.

good service from crew. Before the would have an option between cookies or nuts as snacks.. Now, there are only cookies. too bad. People who can not have sugar don't have a choice.

Decent service - nice seats. Crew were not overly attentive but can’t complain overall for the money

Very nice flight, easy connections in Keflavík, and friendly crew.

I will never fly this airline again. Checking in was poor , we had to go back to the check in counter at Raleigh - Durham international airport three times because they didn’t issue my boarding pass but rather duplicated my husband’s twice which caused a big headache at the passport control at the airport which triggered security alert and wouldn’t let us pass through we we had to wait for long time to be able to explain and clear everything after talking to the supervisor.. No food on the plane , not even crackers. No food was offered to buy ether . No ear phone was provided . Very little time to make from one plane to another and nobody to assist with smooth transition. Flight itself , we felt safe so thank you to the pilots . But customer service was terrible . We spent $ 2500 on 2 tickets, so I cannot say that service was consistent with the price .

Seats are way too much now with these new airplanes especially long flights like we had. I was 7 month pregnant and in a lot of discomfort due to small seats.

Food was horrible. This wasn’t business class. No leg space, can’t sleep in row position, huge delay

I liked how easy my transfers between flights in Keflavik were. I would have appreciated more food options in Keflavik.

The plane was flaming hot! Could not breathe. Everyone coughing from heat. Awful.

My biggest problem was the flight from KEF to DUB was delayed, which caused me to miss my connecting flight in DUB and we were forced into an unplanned 10-hour layover in DUB. Crew and boarding staff were all very friendly but this was a real inconvenience and especially uncomfortable for my disabled wife.

Not much! This was my first flight with Iceland air and unfortunately it wasn’t what I have expected. My luggage is lost nothing as of yet where it was left. Not a good service at all!!

The seat size was more like a domestic than an international flight. In fact, i would compare the ammenities, quality and service to a short hall ryan air flight, which was unexpected for an international flight. The plane was extremely hot so sleeping was difficult. My biggest complaint was that they are very strict on carry on luggage only allowing it to weigh 10kg/22lb. I try to limit myself to a carryon so i don't have to mess with bagage claim, but the wieght restriction made it impossible. I have never had a carry on weight restriction (at least enforced) on an international flight. Will not be including them in future searches.

The flight as far as timings go was excellent. Unfortunately we ended up sat with someone on a night flight who had been drinking alcohol before boarding and BA staff were happily serving him more alcohol. He was very drunk which made our flight uncomfortable and awkward. My partner had this person lying on him whilst asleep. Alcohol should be served minimally. If there had been an emergency this person would not have been in a fit state to act accordingly.

First time flying with BA and I will do it again. Staff at airport and on board were very nice and helpful

Wonderful service and very comfy in the bulkhead in Economy Plus! Delicious food.

The BA team at Sky Harbor is deplorable, full of unnecessary attitude and poor communication. It seems like every member of the team was looking at another to solve the problem, instead of taking agency to do so themselves. I saw no less than 6 altercations with the same gate agent where he threatened to revoke the passengers boarding pass for asking a wildly reasonable question, something as simple as where the cue to board was. I’ve complained to BA before but it seems this isn’t an issue for them, which is very disappointing

Boarding poor in London,ok in Chicago. Don’t like Heatrow/terminal5

It was very good. We got a late start by about an hour and a half. However I worked rather have that than crash. It was purely mechanical. They had our tickets ready when we came off the plane in London for the next leg. The only mishap was when we got to Lisbon my husbands luggage made or bit mine didn't. All was not lost because I did finally get it 2 days later. I was really pleased that they c made the effort.

Liked that my American Airlines status seamlessly transferred to BA so luggage check was free. Flights were on time, boarding quick. Wish they didn’t assign connecting gate so late at Heathrow.

The entire process was flawless and as expected flying first class. The only thing that I have a complaint on...when first boarding, the plane was EXTREMELY cold; then when we were trying to sleep, it was way too hot - just better regulating (especially trying to sleep) would have made it perfect.

- OK plane. Basic accommodations. OK food. The digital window shade wasn't working.

- OK plane. Basic accommodations. OK food. The digital window shade wasn't working. - Expect to be woken up more than an hour before landing when they start dinging the bell and making announcements and turning on all cabin lights to serve a snack. I would prefer they remain quiet and only serve people who want to wake up.

Book cheap flights from Seattle to Cambridge

Recent round-trip flight deals

10/7Mon
1 stop
11h 35mSEA-STN
10/18Fri
1 stop
17h 51mSTN-SEA
$526
10/1Tue
1 stop
33h 55mSEA-LGW
10/8Tue
1 stop
32h 45mLGW-SEA
$540
11/24Sun
1 stopIcelandair
12h 20mSEA-LGW
11/29Fri
1 stopIcelandair
13h 00mLGW-SEA
$578
11/24Sun
1 stopIcelandair
12h 20mSEA-LHR
11/29Fri
1 stopIcelandair
12h 45mLHR-SEA
$580
10/1Tue
nonstopBritish Airways
9h 20mSEA-LHR
10/18Fri
nonstopBritish Airways
9h 45mLHR-SEA
$599
10/1Tue
1 stopBritish Airways
14h 11mSEA-LHR
10/31Thu
nonstopBritish Airways
9h 55mLHR-SEA
$604
9/30Mon
nonstopDelta
9h 20mSEA-LHR
10/23Wed
1 stopDelta
16h 10mLHR-SEA
$612
10/7Mon
1 stopDelta
22h 40mSEA-LHR
11/13Wed
1 stopDelta
14h 00mLHR-SEA
$615
8/19Mon
nonstopVirgin Atlantic
9h 35mSEA-LHR
8/27Tue
1 stopVirgin Atlantic
21h 20mLHR-SEA
$706
10/1Tue
1 stopVirgin Atlantic
14h 45mSEA-LGW
10/12Sat
1 stopVirgin Atlantic
18h 20mLGW-SEA
$781

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Recent one-way flight deals

11/20Wed
1 stopIcelandair
12h 20mSEA-LHR
$236
11/20Wed
1 stopIcelandair
12h 20mSEA-LGW
$242
10/8Tue
1 stopIcelandair
11h 55mSEA-LGW
$250
10/1Tue
nonstopIberia
9h 20mSEA-LHR
$445
10/2Wed
nonstopBritish Airways
9h 20mSEA-LHR
$470
10/1Tue
1 stopBritish Airways
14h 45mSEA-LCY
$487
7/15Mon
nonstopIberia
9h 20mSEA-LHR
$520
7/7Sun
1 stopAmerican Airlines
16h 30mSEA-LHR
$552
8/3Sat
2 stopsAmerican Airlines
21h 21mSEA-LHR
$555
9/1Sun
1 stopDelta
14h 30mSEA-LCY
$855

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Last minute flights from Seattle to Cambridge

Last minute flight, train and bus deals

6/4Tue
multi-stop
30h 35mSEA-LHR
6/11Tue
multi-stop
21h 30mLHR-SEA
$877
6/4Tue
multi-stop
30h 35mSEA-LHR
6/11Tue
multi-stop
21h 55mLHR-SEA
$940
6/4Tue
multi-stop
22h 55mSEA-LHR
6/11Tue
multi-stop
21h 30mLHR-SEA
$942
6/4Tue
multi-stop
27h 20mSEA-LGW
6/12Wed
multi-stop
24h 55mLGW-SEA
$948
6/3Mon
multi-stopIcelandair
16h 19mSEA-LGW
6/17Mon
multi-stopIcelandair
30h 20mLGW-SEA
$1,385
6/4Tue
multi-stopIcelandair
11h 55mSEA-LGW
7/16Tue
multi-stopIcelandair
12h 40mLGW-SEA
$1,401
6/4Tue
nonstopBritish Airways
9h 20mSEA-LHR
6/11Tue
nonstopBritish Airways
9h 45mLHR-SEA
$1,558
6/4Tue
multi-stopBritish Airways
14h 50mSEA-LHR
6/11Tue
nonstopBritish Airways
9h 45mLHR-SEA
$1,563
6/4Tue
multi-stopAmerican Airlines
16h 43mSEA-LHR
6/11Tue
nonstopAmerican Airlines
9h 45mLHR-SEA
$1,631
6/4Tue
nonstopIberia
9h 20mSEA-LHR
6/18Tue
nonstopIberia
9h 45mLHR-SEA
$1,635

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