Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from the United States to London from $208

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 4/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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.
WestJet Logo
6:00 am - 5:20 am
SFO
-
YXU
20h 20m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$371WestJet
Mon, Apr 27 - Mon, May 4
WestJet Logo
3:30 pm - 5:20 am
SAN
-
YXU
10h 50m
1 stop
WestJet Logo
6:10 am - 2:10 pm
YXU
-
SAN
11h 00m
1 stop
$413WestJet
Mon, Apr 27 - Mon, May 4
Air Canada Logo
7:30 pm - 11:43 am
SFO
-
YXU
13h 13m
2 stops
Air Canada Logo
5:40 am - 10:50 am
YXU
-
SFO
8h 10m
1 stop
$415Air Canada
Fri, May 1 - Tue, May 5
WestJet Logo
5:30 pm - 5:20 am
ORD
-
YXU
10h 50m
1 stop
WestJet Logo
6:10 am - 4:40 pm
YXU
-
ORD
11h 30m
1 stop
$426WestJet
Thu, Apr 30 - Thu, May 7
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$426WestJet
Wed, Jun 17 - Mon, Jun 22
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$427WestJet
Wed, Jun 17 - Mon, Jun 22
Air Canada Logo
1:15 pm - 8:53 am
SAN
-
YXU
16h 38m
1 stop
Air Canada Logo
9:30 am - 8:43 pm
YXU
-
SAN
14h 13m
2 stops
$433Air Canada
Fri, May 1 - Mon, May 4
Air Canada Logo
7:30 pm - 11:43 am
SFO
-
YXU
13h 13m
2 stops
Air Canada Logo
5:40 am - 6:32 pm
YXU
-
SFO
15h 52m
2 stops
$440Air Canada
Fri, May 1 - Tue, May 5
Multiple Airlines Logo
6:45 pm - 5:20 am
SFO
-
YXU
31h 35m
2 stops
Multiple Airlines Logo
6:10 am - 9:55 pm
YXU
-
SFO
18h 45m
1 stop
$448Multiple Airlines
Mon, Apr 27 - Mon, May 4
Air Canada Logo
1:15 pm - 8:53 am
SAN
-
YXU
16h 38m
1 stop
Air Canada Logo
5:40 am - 8:43 pm
YXU
-
SAN
18h 03m
2 stops
$458Air Canada
Fri, May 1 - Mon, May 4

Air Canada flights from United States to London, Ontario

Our best Air Canada deals on United States to London, Ontario flight tickets
Air Canada
May 1
SFO7:30 pmSan Francisco
13h 13m
2 stops
YXU11:43 amLondon
May 5
YXU5:40 amLondon
8h 10m
1 stop
SFO10:50 amSan Francisco
$415
Air Canada
May 1
SAN1:15 pmSan Diego
16h 38m
1 stop
YXU8:53 amLondon
May 4
YXU9:30 amLondon
14h 13m
2 stops
SAN8:43 pmSan Diego
$433
Air Canada
May 1
SFO7:30 pmSan Francisco
13h 13m
2 stops
YXU11:43 amLondon
May 5
YXU5:40 amLondon
15h 52m
2 stops
SFO6:32 pmSan Francisco
$440

United Airlines flights from United States to London, Ontario

Our best United Airlines deals on United States to London, Ontario flight tickets
United Airlines
Apr 29
SFO11:59 pmSan Francisco
14h 05m
2 stops
YXU5:04 pmLondon
May 6
YXU5:40 amLondon
10h 00m
1 stop
SFO12:40 pmSan Francisco
$599
United Airlines
Apr 29
SFO11:59 pmSan Francisco
14h 05m
2 stops
YXU5:04 pmLondon
May 6
YXU5:40 amLondon
15h 01m
2 stops
SFO5:41 pmSan Francisco
$614
United Airlines
Apr 30
SFO11:05 pmSan Francisco
15h 28m
2 stops
YXU5:33 pmLondon
May 7
YXU5:40 amLondon
10h 43m
2 stops
SFO1:23 pmSan Francisco
$639

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 March 17, 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

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 4/27

6:00 am-5:20 am

1 stop20h 20m

London

Mon 5/4

6:10 am-12:00 pm

1 stop8h 50m

$371

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Mon 4/27

3:30 pm-5:20 am

1 stop10h 50m

London

Mon 5/4

6:10 am-2:10 pm

1 stop11h 00m

$413

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 5/1

7:30 pm-11:43 am

2 stops13h 13m

London

Tue 5/5

5:40 am-10:50 am

1 stop8h 10m

$415

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 4/30

5:30 pm-5:20 am

1 stop10h 50m

London

Thu 5/7

6:10 am-4:40 pm

1 stop11h 30m

$426
Quickest round-trip

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 6/17

6:05 pm-5:20 am

1 stop8h 15m

London

Mon 6/22

6:10 am-12:00 pm

1 stop8h 50m

$426

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 6/17

6:05 pm-5:20 am

1 stop8h 15m

London

Mon 6/22

6:10 am-12:00 pm

1 stop8h 50m

$427

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Fri 5/1

1:15 pm-8:53 am

1 stop16h 38m

London

Mon 5/4

9:30 am-8:43 pm

2 stops14h 13m

$433

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 5/1

7:30 pm-11:43 am

2 stops13h 13m

London

Tue 5/5

5:40 am-6:32 pm

2 stops15h 52m

$440

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 4/27

6:45 pm-5:20 am

2 stops31h 35m

London

Mon 5/4

6:10 am-9:55 pm

1 stop18h 45m

$448

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Fri 5/1

1:15 pm-8:53 am

1 stop16h 38m

London

Mon 5/4

5:40 am-8:43 pm

2 stops18h 03m

$458

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

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 04m

Direct flights

None
The fastest flight from United States to London, Ontario takes 4h 04m
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?

  • 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?

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
Air CanadaPriceFrom $81Free CancellationRating
7.1
10,811 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.

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 4/16
Thu 4/23
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Canada