How long does it take to fly to London, Ontario?

If you’re flying from a popular airport in United States, such as New York or Boston, and flying into London, Ontario, then you can expect flight times to average 1h 45m and 1h 53m, respectively.

What airlines fly to London, Ontario?

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to London, Ontario from United States according to our data. Air Canada is the first choice among our users, with 51% of people opting to fly with this airline when traveling to London, Ontario. Keep in mind that there are 10 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from United States to London?

Air Canada, WestJet, and United Airlines are the most popular carriers operating from United States to London

When did momondo last update prices for flights from United States to London Airport?

Prices for flights from United States to London Airport were last updated today.

How many operators does momondo search for flights from United States to London Airport?

As of January 2026, there are 3 operators available to choose from for flights from United States to London Airport.

How old do you have to be to fly from United States to London Airport?

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 United States to London Airport.

What documentation or ID do you need to fly to London Airport?

The travel and health documents you'll need for your trip to London Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$137 Cheap Flights from the United States to London in 2026

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8:00 pm - 8:46 am

SEA

YXU

9h 46m2 stops

5:40 pm - 10:16 pm

YXU

SEA

7h 36m1 stop

$277Air Canada

Thu, Jan 29 - Sun, Feb 1

8:00 pm - 8:46 am

SEA

YXU

9h 46m2 stops

5:10 am - 2:31 pm

YXU

SEA

12h 21m2 stops

$282Air Canada

Thu, Jan 29 - Sun, Feb 1

8:10 am - 9:21 pm

SEA

YXU

10h 11m1 stop

5:40 pm - 10:16 pm

YXU

SEA

7h 36m1 stop

$296Air Canada

Thu, Jan 29 - Sun, Feb 1

8:00 pm - 8:46 am

SEA

YXU

9h 46m2 stops

5:10 am - 7:16 pm

YXU

SEA

17h 06m2 stops

$301Air Canada

Thu, Jan 29 - Sun, Feb 1

5:30 pm - 5:12 am

ORD

YXU

10h 42m1 stop

8:00 pm - 4:43 pm

YXU

ORD

21h 43m1 stop

$325WestJet

Mon, May 25 - Thu, May 28

2:45 pm - 5:12 am

SFO

YXU

11h 27m2 stops

8:00 pm - 1:57 pm

YXU

SFO

20h 57m2 stops

$330WestJet

Sat, Jun 27 - Wed, Jul 1

5:35 pm - 6:35 am

JFK

YXU

13h 00m1 stop

8:10 pm - 11:58 am

YXU

JFK

15h 48m2 stops

$356Multiple Airlines

Mon, Feb 2 - Mon, Feb 9

8:59 am - 6:35 am

ORD

YXU

20h 36m2 stops

8:10 pm - 1:35 pm

YXU

ORD

18h 25m1 stop

$360Multiple Airlines

Thu, Feb 19 - Thu, Feb 26

11:59 pm - 9:21 pm

SEA

YXU

18h 22m2 stops

5:40 pm - 10:16 pm

YXU

SEA

7h 36m1 stop

$367United Airlines

Thu, Feb 19 - Thu, Feb 26

8:10 am - 9:21 pm

SEA

YXU

10h 11m1 stop

5:40 pm - 10:16 pm

YXU

SEA

7h 36m1 stop

$382United Airlines

Thu, Feb 19 - Thu, Feb 26

Air Canada flights from United States to London, Ontario

Our best Air Canada deals on United States to London, Ontario flight tickets

Air Canada

Jan 29

SEA8:00 pmSeattle/Tacoma Intl

9h 46m

2 stops

YXU8:46 amLondon

Feb 1

YXU5:40 pmLondon

7h 36m

1 stop

SEA10:16 pmSeattle/Tacoma Intl

$277

Find similar

Air Canada

Jan 29

SEA8:00 pmSeattle/Tacoma Intl

9h 46m

2 stops

YXU8:46 amLondon

Feb 1

YXU5:10 amLondon

12h 21m

2 stops

SEA2:31 pmSeattle/Tacoma Intl

$282

Find similar

Air Canada

Jan 29

SEA8:10 amSeattle/Tacoma Intl

10h 11m

1 stop

YXU9:21 pmLondon

Feb 1

YXU5:40 pmLondon

7h 36m

1 stop

SEA10:16 pmSeattle/Tacoma Intl

$296

Find similar

United Airlines flights from United States to London, Ontario

Our best United Airlines deals on United States to London, Ontario flight tickets

United Airlines

Feb 19

SEA11:59 pmSeattle/Tacoma Intl

18h 22m

2 stops

YXU9:21 pmLondon

Feb 26

YXU5:40 pmLondon

7h 36m

1 stop

SEA10:16 pmSeattle/Tacoma Intl

$367

Find similar

United Airlines

Feb 19

SEA8:10 amSeattle/Tacoma Intl

10h 11m

1 stop

YXU9:21 pmLondon

Feb 26

YXU5:40 pmLondon

7h 36m

1 stop

SEA10:16 pmSeattle/Tacoma Intl

$382

Find similar

United Airlines

Feb 19

SEA11:59 pmSeattle/Tacoma Intl

18h 22m

2 stops

YXU9:21 pmLondon

Feb 26

YXU5:10 amLondon

20h 33m

2 stops

SEA10:43 pmSeattle/Tacoma Intl

$383

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from the United States to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 1/29

8:00 pm-8:46 am

2 stops9h 46m

London

Sun 2/1

5:40 pm-10:16 pm

1 stop7h 36m

$277

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 1/29

8:00 pm-8:46 am

2 stops9h 46m

London

Sun 2/1

5:10 am-2:31 pm

2 stops12h 21m

$282

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 1/29

8:10 am-9:21 pm

1 stop10h 11m

London

Sun 2/1

5:40 pm-10:16 pm

1 stop7h 36m

$296

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 1/29

8:00 pm-8:46 am

2 stops9h 46m

London

Sun 2/1

5:10 am-7:16 pm

2 stops17h 06m

$301

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 5/25

5:30 pm-5:12 am

1 stop10h 42m

London

Thu 5/28

8:00 pm-4:43 pm

1 stop21h 43m

$325

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 6/27

2:45 pm-5:12 am

2 stops11h 27m

London

Wed 7/1

8:00 pm-1:57 pm

2 stops20h 57m

$330

New YorkLondon

JFK - YXU

JFKYXU

New York John F Kennedy Intl

Mon 2/2

5:35 pm-6:35 am

1 stop13h 00m

London

Mon 2/9

8:10 pm-11:58 am

2 stops15h 48m

$356

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 2/19

8:59 am-6:35 am

2 stops20h 36m

London

Thu 2/26

8:10 pm-1:35 pm

1 stop18h 25m

$360

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 2/19

11:59 pm-9:21 pm

2 stops18h 22m

London

Thu 2/26

5:40 pm-10:16 pm

1 stop7h 36m

$367

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 2/19

8:10 am-9:21 pm

1 stop10h 11m

London

Thu 2/26

5:40 pm-10:16 pm

1 stop7h 36m

$382

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 United States to London, Ontario

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 cheapest United States to London flight route?

Fly from Orlando to London for the best United States - London flight prices

What cabin class options are available on United States to London flights?

There is only 1 cabin class available to choose from on United States to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on United States to London, Ontario flights?

No. A direct flight is the cheapest option for a flight between United States to London, Ontario.

Cheap United States to London, Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to London, Ontario

Fastest flight time	4h 00m
Direct flights	None

The fastest flight from United States to London, Ontario takes 4h 00m

There are no direct flights from United States to London, Ontario. There are no popular flight routes from United States to London, Ontario.

Search flight deals

When did momondo last update prices for flights from United States to London Airport?
Prices for flights from United States to London Airport were last updated today.
How many operators does momondo search for flights from United States to London Airport?
As of January 2026, there are 3 operators available to choose from for flights from United States to London Airport.
How old do you have to be to fly from United States to London Airport?
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 United States to London Airport.
What documentation or ID do you need to fly to London Airport?
The travel and health documents you'll need for your trip to London Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from United States to London, Ontario?
Based on momondo bookings for flights between United States and London, Ontario, the leading plane model is Boeing 737 MAX 8, making up 80.00% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 20.00%.

Best airlines flying from United States to London, Ontario

Compare and see reviews for airlines that fly from United States to London, Ontario with momondo

Airline	Rating	Free Cancellation	Price
WestJet	PriceFrom $162	Free Cancellation	Rating 7.2 3,235 reviews	Search WestJet flights
United Airlines	PriceFrom $192	Free Cancellation	Rating 7.4 9,138 reviews	Search United Airlines flights
Air Canada	PriceFrom $210	Free Cancellation	Rating 7.1 10,600 reviews	Search Air Canada flights

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Why use momondo?

Why should I use momondo to find a flight deal from United States to London?

It is quick and easy to find United States to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from United States to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from United States with this policy.

How can momondo help me find flights from United States to London?

momondo helps you find the best flight between United States and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from United States and alert you when they change.

An easier way to manage your London, Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from the United States to London from $137

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to London departing on 2/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

Filter for what you want

Filter for what you want

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Trusted and free

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Find the cheapest flights from the United States to London

Recent round-trip flight deals from the United States to London

Recent one-way flight deals from the United States to London

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Air Canada flights from United States to London, Ontario

Our best Air Canada deals on United States to London, Ontario flight tickets

United Airlines flights from United States to London, Ontario

Our best United Airlines deals on United States to London, Ontario flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from the United States to London, Ontario that are best for you.

See travel insights to London from

How to get the cheapest flight ticket from United States to London, Ontario

What is the cheapest United States to London flight route?

Fly from Orlando to London for the best United States - London flight prices

What cabin class options are available on United States to London flights?

There is only 1 cabin class available to choose from on United States to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on United States to London, Ontario flights?

No. A direct flight is the cheapest option for a flight between United States to London, Ontario.

What is the cheapest airline that flies from United States to London?

Air Canada, WestJet, and United Airlines are the most popular carriers operating from United States to London

What airlines fly to London, Ontario?

How long does it take to fly to London, Ontario?

If you’re flying from a popular airport in United States, such as New York or Boston, and flying into London, Ontario, then you can expect flight times to average 1h 45m and 1h 53m, respectively.

Cheap United States to London, Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to London, Ontario

Fastest flight time

Direct flights

When did momondo last update prices for flights from United States to London Airport?

How many operators does momondo search for flights from United States to London Airport?

How old do you have to be to fly from United States to London Airport?

What documentation or ID do you need to fly to London Airport?

What is the most popular plane model from United States to London, Ontario?

Best airlines flying from United States to London, Ontario

Compare and see reviews for airlines that fly from United States to London, Ontario with momondo

Traveling to a place near London?

Why use momondo?

Why should I use momondo to find a flight deal from United States to London?

Can I find flights from United States to London with flexible booking policies on momondo?

How can momondo help me find flights from United States to London?

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

An easier way to manage your London, Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Canada

Airports servicing Ontario