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Cheap flights from San Antonio to London from $274

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to London departing on 9/26. 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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Find the cheapest flights from San Antonio to London

Cheap round-trip flights

Iberia Logo
6:36 pm - 2:25 pmSAT-LHR
13h 49m1 stop
Iberia Logo
4:25 pm - 11:46 pmLHR-SAT
13h 21m1 stop
$520Iberia
Find Deal
Sun, Sep 7 - Thu, Sep 25
Iberia Logo
3:00 pm - 10:00 amSAT-LHR
13h 00m1 stop
Iberia Logo
10:15 am - 7:41 pmLHR-SAT
15h 26m1 stop
$521Iberia
Find Deal
Tue, Nov 4 - Thu, Nov 20
Delta Logo
11:35 am - 9:15 amSAT-LHR
15h 40m1 stop
Delta Logo
9:00 am - 8:28 pmLHR-SAT
17h 28m2 stops
$523Delta
Find Deal
Tue, Sep 30 - Wed, Oct 15
Delta Logo
3:00 pm - 9:00 amSAT-LHR
12h 00m1 stop
Delta Logo
8:40 am - 9:29 pmLHR-SAT
18h 49m2 stops
$524Delta
Find Deal
Tue, Dec 9 - Tue, Dec 16
British Airways Logo
5:16 pm - 10:50 amSAT-LHR
11h 34m1 stop
British Airways Logo
9:15 am - 9:22 pmLHR-SAT
18h 07m1 stop
$530British Airways
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Tue, Sep 23 - Tue, Sep 30
Virgin Atlantic Logo
11:34 am - 8:05 amSAT-LHR
14h 31m2 stops
Virgin Atlantic Logo
12:25 pm - 11:57 pmLHR-SAT
17h 32m2 stops
$585Virgin Atlantic
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Fri, Sep 5 - Tue, Sep 9
British Airways Logo
6:39 pm - 2:25 pmSAT-LHR
13h 46m1 stop
British Airways Logo
2:55 pm - 11:43 pmLHR-SAT
13h 48m1 stop
$603British Airways
Find Deal
Sun, Oct 19 - Sun, Oct 26
Virgin Atlantic Logo
4:51 pm - 2:35 pmSAT-LHR
15h 44m1 stop
Virgin Atlantic Logo
1:00 pm - 12:20 amLHR-SAT
16h 20m2 stops
$635Virgin Atlantic
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Thu, Oct 9 - Mon, Oct 27
Air Canada Logo
8:39 am - 7:10 amSAT-LHR
16h 31m2 stops
Air Canada Logo
11:10 am - 9:20 pmLHR-SAT
16h 10m2 stops
$703Air Canada
Find Deal
Tue, Nov 4 - Thu, Nov 20
Air Canada Logo
6:45 am - 6:30 amSAT-LHR
17h 45m2 stops
Air Canada Logo
2:05 pm - 3:58 pmLHR-SAT
31h 53m2 stops
$727Air Canada
Find Deal
Tue, Sep 30 - Wed, Oct 15

British Airways flights from San Antonio to London Heathrow Airport

Our best British Airways deals on San Antonio to London Heathrow Airport flight tickets
British Airways
Sep 23
SAT5:16 pmSan Antonio
11h 34m
1 stop
LHR10:50 amLondon Heathrow
Sep 30
LHR9:15 amLondon Heathrow
18h 07m
1 stop
SAT9:22 pmSan Antonio
$530
Find similar
British Airways
Sep 2
SAT6:45 pmSan Antonio
13h 40m
1 stop
LHR2:25 pmLondon Heathrow
Sep 8
LHR8:20 amLondon Heathrow
14h 22m
1 stop
SAT4:42 pmSan Antonio
$579
Find similar
British Airways
Oct 19
SAT6:39 pmSan Antonio
13h 46m
1 stop
LHR2:25 pmLondon Heathrow
Oct 26
LHR2:55 pmLondon Heathrow
13h 48m
1 stop
SAT11:43 pmSan Antonio
$603
Find similar

Delta flights from San Antonio to London Heathrow Airport

Our best Delta deals on San Antonio to London Heathrow Airport flight tickets
Delta
Sep 30
SAT11:35 amSan Antonio
15h 40m
1 stop
LHR9:15 amLondon Heathrow
Oct 15
LHR9:00 amLondon Heathrow
17h 28m
2 stops
SAT8:28 pmSan Antonio
$523
Find similar
Delta
Dec 9
SAT3:00 pmSan Antonio
12h 00m
1 stop
LHR9:00 amLondon Heathrow
Dec 16
LHR8:40 amLondon Heathrow
18h 49m
2 stops
SAT9:29 pmSan Antonio
$524
Find similar
Delta
Sep 23
SAT11:26 amSan Antonio
15h 24m
2 stops
LHR8:50 amLondon Heathrow
Sep 30
LHR11:30 amLondon Heathrow
18h 29m
2 stops
SAT11:59 pmSan Antonio
$527
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Antonio to London Heathrow Airport 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 August 26, 2025.
Use the filters below to find and compare flights from San Antonio to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 9/7

6:36 pm-2:25 pm

1 stop13h 49m

London Heathrow

Thu 9/25

4:25 pm-11:46 pm

1 stop13h 21m

$520

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 11/4

3:00 pm-10:00 am

1 stop13h 00m

London Heathrow

Thu 11/20

10:15 am-7:41 pm

1 stop15h 26m

$521

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/30

11:35 am-9:15 am

1 stop15h 40m

London Heathrow

Wed 10/15

9:00 am-8:28 pm

2 stops17h 28m

$523

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 12/9

3:00 pm-9:00 am

1 stop12h 00m

London Heathrow

Tue 12/16

8:40 am-9:29 pm

2 stops18h 49m

$524

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/23

5:16 pm-10:50 am

1 stop11h 34m

London Heathrow

Tue 9/30

9:15 am-9:22 pm

1 stop18h 07m

$530

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 9/5

11:34 am-8:05 am

2 stops14h 31m

London Heathrow

Tue 9/9

12:25 pm-11:57 pm

2 stops17h 32m

$585

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 10/19

6:39 pm-2:25 pm

1 stop13h 46m

London Heathrow

Sun 10/26

2:55 pm-11:43 pm

1 stop13h 48m

$603

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 10/9

4:51 pm-2:35 pm

1 stop15h 44m

London Heathrow

Mon 10/27

1:00 pm-12:20 am

2 stops16h 20m

$635

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 11/4

8:39 am-7:10 am

2 stops16h 31m

London Heathrow

Thu 11/20

11:10 am-9:20 pm

2 stops16h 10m

$703

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/30

6:45 am-6:30 am

2 stops17h 45m

London Heathrow

Wed 10/15

2:05 pm-3:58 pm

2 stops31h 53m

$727

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 San Antonio to London Heathrow Airport

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 typical price of a round-trip flight between San Antonio and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from San Antonio, with most prices found around $703. If you’re not able to fly to London Heathrow Airport in October, then August is your next best option. Flight prices from San Antonio to London Heathrow Airport during August average around $777.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Thursday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $903. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,126.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at noon. momondo users have found flights departing from San Antonio to London Heathrow Airport at noon for as low as $893. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $1,030.

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $980 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from San Antonio for as low as $771 on momondo.

Can stopping save me money on San Antonio to London Heathrow Airport flights?

You could potentially save up to 10% on your flight if you consider stops on a San Antonio to London Heathrow Airport flight.

How have San Antonio to London Heathrow Airport flight prices changed over time?

As of August 2025, prices for San Antonio to London Heathrow Airport flights are approximately 40% cheaper when compared to flights at the same time last year.

When to book flights from San Antonio to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from San Antonio to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Antonio to London Heathrow Airport (SAT to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Antonio to London Heathrow Airport

Direct flights

None
There are no direct flights from San Antonio to London Heathrow Airport. There are no popular flight routes from San Antonio to London Heathrow Airport.
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  • How far is San Antonio to London Heathrow by plane?

    There are 4973.6 mi between San Antonio and London Heathrow. 11h 34m is a normal flight duration for this route.

  • When did momondo last update prices for flights from San Antonio Airport to London Heathrow Airport?

    Prices for flights from San Antonio Airport to London Heathrow Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from San Antonio Airport to London Heathrow Airport?

  • How old do you have to be to fly from San Antonio Airport to London Heathrow Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to London Heathrow Airport.

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

    The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from San Antonio to London Heathrow Airport?

Best airlines flying from San Antonio to London Heathrow Airport

Compare and see reviews for airlines that fly from San Antonio to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $570Free CancellationRating
6.7
7,309 reviews
Search British Airways flights
American AirlinesPriceFrom $630Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $649Free CancellationRating
7.9
7,979 reviews
Search Delta flights
IberiaPriceFrom $672Free CancellationRating
7.0
2,891 reviews
Search Iberia flights
Virgin AtlanticPriceFrom $688Free CancellationRating
7.4
658 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom $692Free CancellationRating
7.4
8,943 reviews
Search United Airlines flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Luton
Dover
Slough
Milton Keynes
Guildford
Dartford
Crawley
Stansted
Hayes
Chelmsford
Salisbury
Brentwood
Ilford
Folkestone
Swindon
Colchester
Stratford-upon-Avon
Watford

Why use momondo?

Why should I use momondo to find a flight deal from San Antonio to London?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from San Antonio.

Can I find flights from San Antonio to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from San Antonio with this policy.

How can momondo help me find flights from San Antonio to London?

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

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

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

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