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

The average flight duration from United States to London, Ontario depends on which airport you fly into and out of. Flying from Boston to Toronto Pearson Intl Airport is 1h 48m on average, while flying from New York to Toronto Pearson Intl Airport is 1h 49m on average. Toronto Pearson Intl Airport is the most popular airport in London, Ontario.

Which airlines fly to London, Ontario?

Air Canada, Porter Airlines and WestJet 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 44% of people opting to fly with this airline when travelling to London, Ontario. Keep in mind that there are 9 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?

WestJet, Air Canada, 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 old do you have to be to fly from United States to London Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to London Airport.

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

The travel and health documents required for your trip to London Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

C$ 242 Cheap Flights from the United States to London, Ontario in 2026

Find the cheapest flights from the United States to London

Round-trip

One-way

Last minute

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

Enter your travel dates to find the best prices.

12:15 p.m. - 5:20 a.m.

DEN

YXU

15h 05m

1 stop

5:55 p.m. - 11:20 a.m.

YXU

DEN

19h 25m

1 stop

C$ 553WestJet

Sun, 6 Sep - Sun, 13 Sep

12:15 p.m. - 7:50 p.m.

DEN

YXU

29h 35m

1 stop

5:55 p.m. - 11:20 a.m.

YXU

DEN

19h 25m

1 stop

C$ 597WestJet

Thu, 13 Aug - Mon, 17 Aug

12:15 p.m. - 5:20 a.m.

DEN

YXU

15h 05m

1 stop

6:10 a.m. - 9:40 a.m.

YXU

DEN

29h 30m

2 stops

C$ 612Multiple Airlines

Sun, 6 Sep - Sun, 13 Sep

7:00 a.m. - 4:45 p.m.

SEA

YXU

6h 45m

1 stop

5:55 p.m. - 9:40 a.m.

YXU

SEA

18h 45m

1 stop

C$ 615WestJet

Sat, 29 Aug - Fri, 18 Sep

8:31 a.m. - 5:20 a.m.

DEN

YXU

18h 49m

2 stops

6:10 a.m. - 11:20 a.m.

YXU

DEN

31h 10m

1 stop

C$ 701Multiple Airlines

Sat, 5 Sep - Sat, 12 Sep

7:00 a.m. - 4:45 p.m.

SEA

YXU

6h 45m

1 stop

6:10 a.m. - 9:00 p.m.

YXU

SEA

17h 50m

1 stop

C$ 705WestJet

Tue, 25 Aug - Sat, 29 Aug

2:15 p.m. - 9:40 p.m.

ORD

YXU

6h 25m

1 stop

5:40 a.m. - 9:00 a.m.

YXU

ORD

4h 20m

1 stop

C$ 923Air Canada

Thu, 3 Sep - Thu, 10 Sep

4:45 p.m. - 9:40 p.m.

LGA

YXU

4h 55m

1 stop

10:05 a.m. - 1:35 p.m.

YXU

LGA

3h 30m

1 stop

C$ 988Air Canada

Mon, 24 Aug - Sun, 30 Aug

9:05 a.m. - 9:20 a.m.

SEA

YXU

21h 15m

2 stops

5:40 a.m. - 6:29 p.m.

YXU

SEA

15h 49m

2 stops

C$ 1,030United Airlines

Tue, 25 Aug - Sat, 29 Aug

2:40 p.m. - 9:40 p.m.

STL

YXU

6h 00m

1 stop

10:05 a.m. - 2:00 p.m.

YXU

STL

4h 55m

1 stop

C$ 1,398United Airlines

Wed, 2 Sep - Wed, 9 Sep

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WestJet flights from United States to London, Ontario

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

WestJet

6 Sep

DEN12:15 p.m.Denver Intl

15h 05m

1 stop

YXU5:20 a.m.London

13 Sep

YXU5:55 p.m.London

19h 25m

1 stop

DEN11:20 a.m.Denver Intl

C$ 553

WestJet

13 Aug

DEN12:15 p.m.Denver Intl

29h 35m

1 stop

YXU7:50 p.m.London

17 Aug

YXU5:55 p.m.London

19h 25m

1 stop

DEN11:20 a.m.Denver Intl

C$ 597

WestJet

29 Aug

SEA7:00 a.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU4:45 p.m.London

18 Sep

YXU5:55 p.m.London

18h 45m

1 stop

SEA9:40 a.m.Seattle/Tacoma Intl

C$ 615

United Airlines flights from United States to London, Ontario

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

United Airlines

25 Aug

SEA9:05 a.m.Seattle/Tacoma Intl

21h 15m

2 stops

YXU9:20 a.m.London

29 Aug

YXU5:40 a.m.London

15h 49m

2 stops

SEA6:29 p.m.Seattle/Tacoma Intl

C$ 1,030

United Airlines

2 Sep

SEA8:00 a.m.Seattle/Tacoma Intl

6h 42m

1 stop

YXU5:42 p.m.London

9 Sep

YXU5:40 a.m.London

15h 49m

2 stops

SEA6:29 p.m.Seattle/Tacoma Intl

C$ 1,108

United Airlines

2 Sep

SEA8:40 a.m.Seattle/Tacoma Intl

21h 40m

2 stops

YXU9:20 a.m.London

9 Sep

YXU5:40 a.m.London

15h 49m

2 stops

SEA6:29 p.m.Seattle/Tacoma Intl

C$ 1,156

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

Cheapest round-trip

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Sun 6/9

12:15 p.m.-5:20 a.m.

1 stop15h 05m

London

Sun 13/9

5:55 p.m.-11:20 a.m.

1 stop19h 25m

C$ 553

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Thu 13/8

12:15 p.m.-7:50 p.m.

1 stop29h 35m

London

Mon 17/8

5:55 p.m.-11:20 a.m.

1 stop19h 25m

C$ 597

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Sun 6/9

12:15 p.m.-5:20 a.m.

1 stop15h 05m

London

Sun 13/9

6:10 a.m.-9:40 a.m.

2 stops29h 30m

C$ 612

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 29/8

7:00 a.m.-4:45 p.m.

1 stop6h 45m

London

Fri 18/9

5:55 p.m.-9:40 a.m.

1 stop18h 45m

C$ 615

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Sat 5/9

8:31 a.m.-5:20 a.m.

2 stops18h 49m

London

Sat 12/9

6:10 a.m.-11:20 a.m.

1 stop31h 10m

C$ 701

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 25/8

7:00 a.m.-4:45 p.m.

1 stop6h 45m

London

Sat 29/8

6:10 a.m.-9:00 p.m.

1 stop17h 50m

C$ 705

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 3/9

2:15 p.m.-9:40 p.m.

1 stop6h 25m

London

Thu 10/9

5:40 a.m.-9:00 a.m.

1 stop4h 20m

C$ 923

Quickest round-trip

New YorkLondon

LGA - YXU

LGAYXU

New York LaGuardia

Mon 24/8

4:45 p.m.-9:40 p.m.

1 stop4h 55m

London

Sun 30/8

10:05 a.m.-1:35 p.m.

1 stop3h 30m

C$ 988

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 25/8

9:05 a.m.-9:20 a.m.

2 stops21h 15m

London

Sat 29/8

5:40 a.m.-6:29 p.m.

2 stops15h 49m

C$ 1,030

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Wed 2/9

2:40 p.m.-9:40 p.m.

1 stop6h 00m

London

Wed 9/9

10:05 a.m.-2:00 p.m.

1 stop4h 55m

C$ 1,398

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

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

You could potentially save up to 16% on your flight if you consider stops on a United States to London, Ontario flight.

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	3h 42m
Direct flights	None

The fastest flight from United States to London, Ontario takes 3h 42m

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

Frequently asked questions about flying from the United States to London, Ontario

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 old do you have to be to fly from United States to London Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to London Airport.
What documentation or ID do you need to fly to London Airport?
The travel and health documents required for your trip to London Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Grand Bend

Port Stanley

Why use momondo?

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

Finding the right flight to London from United States is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for United States to London flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to London from United States. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of United States to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.