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Cheap flights from the United States to London from $253

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 6/15. 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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0 bags

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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

Enter your travel dates to find the best prices.
Air Canada Logo
3:45 pm - 9:37 pm
ORD
-
YXU
4h 52m
1 stop
Air Canada Logo
10:05 am - 1:22 pm
YXU
-
ORD
4h 17m
1 stop
$547Air Canada
Wed, Jun 24 - Wed, Jul 1
Air Canada Logo
2:15 pm - 8:32 pm
ORD
-
YXU
5h 17m
1 stop
Air Canada Logo
10:05 am - 2:55 pm
YXU
-
ORD
5h 50m
1 stop
$548Air Canada
Mon, Jul 13 - Mon, Jul 20
Air Canada Logo
3:45 pm - 9:37 pm
ORD
-
YXU
4h 52m
1 stop
Air Canada Logo
10:05 am - 2:55 pm
YXU
-
ORD
5h 50m
1 stop
$549Air Canada
Sat, Jun 27 - Sat, Jul 4
Air Canada Logo
6:30 am - 2:57 pm
LGA
-
YXU
8h 27m
2 stops
Air Canada Logo
6:20 pm - 10:35 pm
YXU
-
LGA
4h 15m
1 stop
$574Air Canada
Thu, Jun 25 - Thu, Jul 2
WestJet Logo
6:30 pm - 5:20 am
BOS
-
YXU
10h 50m
1 stop
WestJet Logo
6:10 am - 10:20 pm
YXU
-
BOS
16h 10m
1 stop
$591WestJet
Sat, Jul 11 - Sat, Jul 25
WestJet Logo
6:30 pm - 5:20 am
BOS
-
YXU
10h 50m
1 stop
WestJet Logo
6:10 am - 10:20 pm
YXU
-
BOS
16h 10m
1 stop
$600WestJet
Mon, Jul 13 - Mon, Jul 20
Multiple Airlines Logo
6:30 pm - 5:20 am
BOS
-
YXU
10h 50m
1 stop
Multiple Airlines Logo
5:55 pm - 9:05 am
YXU
-
BOS
15h 10m
2 stops
$671Multiple Airlines
Mon, Jul 6 - Thu, Jul 9
Multiple Airlines Logo
8:10 pm - 1:50 pm
BOS
-
YXU
17h 40m
2 stops
Multiple Airlines Logo
6:10 am - 10:20 pm
YXU
-
BOS
16h 10m
1 stop
$678Multiple Airlines
Sat, Jul 11 - Sat, Jul 25
United Airlines Logo
6:15 am - 2:55 pm
IAD
-
YXU
8h 40m
2 stops
United Airlines Logo
10:05 am - 3:25 pm
YXU
-
IAD
5h 20m
1 stop
$774United Airlines
Fri, Sep 18 - Sun, Sep 20
United Airlines Logo
6:15 am - 2:55 pm
IAD
-
YXU
8h 40m
2 stops
United Airlines Logo
3:30 pm - 10:59 pm
YXU
-
IAD
7h 29m
2 stops
$789United Airlines
Fri, Sep 18 - Sun, Sep 20

Air Canada flights from United States to London, Ontario

Our best Air Canada deals on United States to London, Ontario flight tickets
Air Canada
Jun 24
ORD3:45 pmChicago O'Hare Intl
4h 52m
1 stop
YXU9:37 pmLondon
Jul 1
YXU10:05 amLondon
4h 17m
1 stop
ORD1:22 pmChicago O'Hare Intl
$547
Air Canada
Jul 13
ORD2:15 pmChicago O'Hare Intl
5h 17m
1 stop
YXU8:32 pmLondon
Jul 20
YXU10:05 amLondon
5h 50m
1 stop
ORD2:55 pmChicago O'Hare Intl
$548
Air Canada
Jun 27
ORD3:45 pmChicago O'Hare Intl
4h 52m
1 stop
YXU9:37 pmLondon
Jul 4
YXU10:05 amLondon
5h 50m
1 stop
ORD2:55 pmChicago O'Hare Intl
$549

United Airlines flights from United States to London, Ontario

Our best United Airlines deals on United States to London, Ontario flight tickets
United Airlines
Sep 4
EWR11:00 amNewark
3h 55m
1 stop
YXU2:55 pmLondon
Sep 7
YXU10:05 amLondon
3h 32m
1 stop
EWR1:37 pmNewark
$742
United Airlines
Jun 27
ORD1:56 pmChicago O'Hare Intl
6h 41m
1 stop
YXU9:37 pmLondon
Jul 4
YXU5:10 amLondon
4h 50m
1 stop
ORD9:00 amChicago O'Hare Intl
$745
United Airlines
Oct 5
ORD10:54 amChicago O'Hare Intl
9h 46m
2 stops
YXU9:40 pmLondon
Oct 7
YXU10:05 amLondon
6h 46m
1 stop
ORD3:51 pmChicago O'Hare Intl
$746

momondo Fare Finder

 
Customize your flight search to find flights from United States to London, Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 31, 2026.
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
Quickest round-trip

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Wed 6/24

3:45 pm-9:37 pm

1 stop4h 52m

London

Wed 7/1

10:05 am-1:22 pm

1 stop4h 17m

$547

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 7/13

2:15 pm-8:32 pm

1 stop5h 17m

London

Mon 7/20

10:05 am-2:55 pm

1 stop5h 50m

$548

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 6/27

3:45 pm-9:37 pm

1 stop4h 52m

London

Sat 7/4

10:05 am-2:55 pm

1 stop5h 50m

$549

New YorkLondon

LGA - YXU

LGAYXU

New York LaGuardia

Thu 6/25

6:30 am-2:57 pm

2 stops8h 27m

London

Thu 7/2

6:20 pm-10:35 pm

1 stop4h 15m

$574

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Sat 7/11

6:30 pm-5:20 am

1 stop10h 50m

London

Sat 7/25

6:10 am-10:20 pm

1 stop16h 10m

$591

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Mon 7/13

6:30 pm-5:20 am

1 stop10h 50m

London

Mon 7/20

6:10 am-10:20 pm

1 stop16h 10m

$600

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Mon 7/6

6:30 pm-5:20 am

1 stop10h 50m

London

Thu 7/9

5:55 pm-9:05 am

2 stops15h 10m

$671

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Sat 7/11

8:10 pm-1:50 pm

2 stops17h 40m

London

Sat 7/25

6:10 am-10:20 pm

1 stop16h 10m

$678

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 9/18

6:15 am-2:55 pm

2 stops8h 40m

London

Sun 9/20

10:05 am-3:25 pm

1 stop5h 20m

$774

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 9/18

6:15 am-2:55 pm

2 stops8h 40m

London

Sun 9/20

3:30 pm-10:59 pm

2 stops7h 29m

$789

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

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

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

You could potentially save up to 27% 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 55m

Direct flights

None
The fastest flight from United States to London, Ontario takes 3h 55m
There are no direct flights from United States to London, Ontario. There are no popular flight routes from United States to London, Ontario.
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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 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?

    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.

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
WestJetPriceFrom $162Free CancellationRating
7.2
3,350 reviews
Search WestJet flights
Air CanadaPriceFrom $210Free CancellationRating
7.1
11,107 reviews
Search Air Canada flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend
Port Stanley

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.

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