How many flights depart from Seattle to Cambridge on average per week?

As of May 2026, 147 flights take off from Seattle and land in Cambridge each week. The most common flight departure day for this route is Tue, with 15% of weekly flights taking off on this day.

How many flights depart from Seattle to Cambridge on average per day?

21 flights are operational daily from Seattle to Cambridge as of May 2026. The most popular departure time for this route is 1:00PM, with 71% of flights per day taking off in the evening.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Cambridge?

Delta, Icelandair, and Lufthansa are the most popular carriers operating from Seattle/Tacoma Intl to Cambridge

What airlines fly to Cambridge?

Delta, British Airways and Virgin Atlantic are the top three most popular airlines that fly to Cambridge from Seattle according to our data. Delta is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Cambridge. Keep in mind that there are 13 different airlines that fly to Cambridge on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Cambridge?

Prices for flights from Seattle/Tacoma Intl Airport to Cambridge are refreshed on a daily basis.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Cambridge?

As of May 2026, there are 14 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Cambridge.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Cambridge?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Cambridge.

What documentation or ID do you need to fly to Cambridge?

The necessary travel and health documents for your Cambridge trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$445 Cheap Flights from Seattle to Cambridge in 2026

Q: What is the typical price of a round-trip flight between Seattle and Cambridge?

Prices are currently low for flights on this route. Typical prices usually range from $1,074 to $734. The lowest price recently found on this route was $883.

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Find the cheapest flights from Seattle to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:40 pm - 8:35 pm

SEA

STN

20h 55m

2 stops

6:30 am - 9:40 am

STN

SEA

35h 10m

2 stops

$883Multiple Airlines

Tue, Aug 18 - Tue, Aug 25

7:20 am - 6:30 pm

SEA

LHR

27h 10m

2 stops

9:55 am - 1:45 pm

LHR

SEA

35h 50m

2 stops

$885Scandinavian Airlines

Mon, Sep 14 - Thu, Sep 24

3:40 pm - 12:20 am

SEA

STN

24h 40m

2 stops

8:05 am - 9:40 am

STN

SEA

33h 35m

2 stops

$886Multiple Airlines

Mon, Jun 1 - Sat, Jun 6

9:45 pm - 3:35 pm

SEA

LHR

9h 50mnonstop

6:30 am - 11:47 am

LHR

SEA

13h 17m

1 stop

$900KLM

Wed, Aug 19 - Wed, Sep 2

7:00 pm - 2:40 pm

SEA

LGW

11h 40m

1 stop

3:40 pm - 8:40 pm

LGW

SEA

13h 00m

1 stop

$903Icelandair

Wed, Jul 22 - Tue, Aug 4

1:50 pm - 9:30 am

SEA

LCY

11h 40m

1 stop

9:20 am - 4:27 pm

LCY

SEA

15h 07m

1 stop

$931Delta

Tue, Aug 18 - Tue, Aug 25

5:40 pm - 4:40 pm

SEA

LCY

15h 00m

1 stop

10:00 am - 4:35 pm

LCY

SEA

14h 35m

1 stop

$932Delta

Mon, Sep 14 - Thu, Sep 24

1:45 pm - 9:30 am

SEA

LCY

11h 45m

1 stop

10:00 am - 4:39 pm

LCY

SEA

14h 39m

1 stop

$933KLM

Sun, Oct 11 - Tue, Oct 20

5:10 am - 8:50 am

SEA

LCY

19h 40m

2 stops

7:00 pm - 11:47 am

LCY

SEA

24h 47m

1 stop

$936Virgin Atlantic

Mon, Aug 24 - Mon, Sep 7

1:50 pm - 4:40 pm

SEA

LCY

18h 50m

1 stop

9:20 am - 8:29 pm

LCY

SEA

19h 09m

2 stops

$941Virgin Atlantic

Wed, Sep 16 - Tue, Sep 22

Scandinavian Airlines flights from Seattle to Cambridge

Our best Scandinavian Airlines deals on Seattle to Cambridge flight tickets

Scandinavian Airlines

Jul 5

SEA3:55 pmSeattle/Tacoma Intl

17h 05m

2 stops

LHR5:00 pmLondon Heathrow

Jul 21

LHR6:40 amLondon Heathrow

15h 05m

2 stops

SEA1:45 pmSeattle/Tacoma Intl

$883

Scandinavian Airlines

Sep 14

SEA7:20 amSeattle/Tacoma Intl

27h 10m

2 stops

LHR6:30 pmLondon Heathrow

Sep 24

LHR9:55 amLondon Heathrow

35h 50m

2 stops

SEA1:45 pmSeattle/Tacoma Intl

$885

Scandinavian Airlines

Oct 9

SEA3:55 pmSeattle/Tacoma Intl

33h 40m

2 stops

LHR9:35 amLondon Heathrow

Oct 13

LHR7:30 pmLondon Heathrow

34h 34m

2 stops

SEA10:04 pmSeattle/Tacoma Intl

$891

Air Canada flights from Seattle to Cambridge

Our best Air Canada deals on Seattle to Cambridge flight tickets

Air Canada

Aug 18

SEA5:45 amSeattle/Tacoma Intl

20h 15m

2 stops

LHR10:00 amLondon Heathrow

Feb 18

LHR1:25 pmLondon Heathrow

16h 32m

2 stops

SEA9:57 pmSeattle/Tacoma Intl

$934

Air Canada

Sep 5

SEA7:20 pmSeattle/Tacoma Intl

27h 10m

2 stops

LHR6:30 amLondon Heathrow

Sep 23

LHR10:15 amLondon Heathrow

16h 17m

2 stops

SEA6:32 pmSeattle/Tacoma Intl

$936

Air Canada

Aug 15

SEA5:45 amSeattle/Tacoma Intl

40h 45m

2 stops

LHR6:30 amLondon Heathrow

Sep 4

LHR9:30 amLondon Heathrow

17h 02m

2 stops

SEA6:32 pmSeattle/Tacoma Intl

$939

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 8/18

3:40 pm-8:35 pm

2 stops20h 55m

London Stansted

Tue 8/25

6:30 am-9:40 am

2 stops35h 10m

$883

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 9/14

7:20 am-6:30 pm

2 stops27h 10m

London Heathrow

Thu 9/24

9:55 am-1:45 pm

2 stops35h 50m

$885

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 6/1

3:40 pm-12:20 am

2 stops24h 40m

London Stansted

Sat 6/6

8:05 am-9:40 am

2 stops33h 35m

$886

Quickest round-trip

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 8/19

9:45 pm-3:35 pm

Nonstop9h 50m

London Heathrow

Wed 9/2

6:30 am-11:47 am

1 stop13h 17m

$900

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 7/22

7:00 pm-2:40 pm

1 stop11h 40m

London Gatwick

Tue 8/4

3:40 pm-8:40 pm

1 stop13h 00m

$903

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 8/18

1:50 pm-9:30 am

1 stop11h 40m

London City

Tue 8/25

9:20 am-4:27 pm

1 stop15h 07m

$931

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 9/14

5:40 pm-4:40 pm

1 stop15h 00m

London City

Thu 9/24

10:00 am-4:35 pm

1 stop14h 35m

$932

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 10/11

1:45 pm-9:30 am

1 stop11h 45m

London City

Tue 10/20

10:00 am-4:39 pm

1 stop14h 39m

$933

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 8/24

5:10 am-8:50 am

2 stops19h 40m

London City

Mon 9/7

7:00 pm-11:47 am

1 stop24h 47m

$936

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 9/16

1:50 pm-4:40 pm

1 stop18h 50m

London City

Tue 9/22

9:20 am-8:29 pm

2 stops19h 09m

$941

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Cambridge

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the typical price of a round-trip flight between Seattle and Cambridge?

What is the cheapest Seattle/Tacoma Intl to Cambridge flight route?

Fly from Seattle/Tacoma Intl to London Heathrow for the best Seattle/Tacoma Intl - Cambridge flight prices

How far in advance should I book a flight from Seattle to Cambridge?

You are more likely to see cheaper flights to Cambridge from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Cambridge for around $827 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Cambridge from Seattle for as low as $727 on momondo.

Can stopping save me money on Seattle to Cambridge flights?

No. A direct flight is the cheapest option for a flight between Seattle to Cambridge.

Cheap Seattle to Cambridge flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Cambridge

Fastest flight time	9h 15m
Direct flights	Every day
Airports in Cambridge	6 airports

The fastest flight from Seattle to Cambridge takes 9h 15m

Direct flights go from Seattle to Cambridge every day.

There are 6 airports in Cambridge. From Seattle there are direct flights to London Heathrow (LHR).

Search flight deals

Frequently asked questions about flying from Seattle to Cambridge

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Cambridge?
Prices for flights from Seattle/Tacoma Intl Airport to Cambridge are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Cambridge?
As of May 2026, there are 14 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Cambridge.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Cambridge?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Cambridge.
What documentation or ID do you need to fly to Cambridge?
The necessary travel and health documents for your Cambridge trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Cambridge?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Cambridge is Boeing 737-800 Passenger/BBJ2 (winglets), representing 15.91% of all bookings. The subsequent popular models are Airbus A321neo at 14.76%, Boeing 737-900 at 8.76%, and Boeing 737 MAX 8 at 8.12%.

Best airlines flying from Seattle to Cambridge

Compare and see reviews for airlines that fly from Seattle to Cambridge with momondo

Airline	Rating	Free Cancellation	Price
Aer Lingus	PriceFrom $481	Free Cancellation	Rating 7.3 1,568 reviews	Search Aer Lingus flights
Icelandair	PriceFrom $483	Free Cancellation	Rating 7.0 656 reviews	Search Icelandair flights
American Airlines	PriceFrom $515	Free Cancellation	Rating 7.1 11,646 reviews	Search American Airlines flights
British Airways	PriceFrom $525	Free Cancellation	Rating 6.7 7,988 reviews	Search British Airways flights
Air France	PriceFrom $532	Free Cancellation	Rating 7.4 1,588 reviews	Search Air France flights
United Airlines	PriceFrom $547	Free Cancellation	Rating 7.4 9,735 reviews	Search United Airlines flights
Delta	PriceFrom $547	Free Cancellation	Rating 7.9 8,452 reviews	Search Delta flights
Finnair	PriceFrom $556	Free Cancellation	Rating 7.7 1,396 reviews	Search Finnair flights
Virgin Atlantic	PriceFrom $570	Free Cancellation	Rating 7.4 688 reviews	Search Virgin Atlantic flights
Alaska Airlines	PriceFrom $589	Free Cancellation	Rating 7.9 12,378 reviews	Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Cambridge?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Cambridge for you.

Can I find flights from Seattle to Cambridge with flexible booking policies on momondo?

All flight searches from Seattle to Cambridge on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Cambridge?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Cambridge from Seattle.

I’m not ready to book a flight from Seattle to Cambridge right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Cambridge now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Cambridge and let you know when they change.