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Cheap flights from San Antonio to London from $335

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 9/20. 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 San Antonio to London

Cheap round-trip flights

United Airlines Logo
2:25 pm - 7:40 amSAT-LHR
11h 15m1 stop
United Airlines Logo
9:30 am - 11:37 amLHR-SAT
32h 07m2 stops
$507United Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
Air Canada Logo
9:50 am - 7:40 amSAT-LHR
15h 50m1 stop
Air Canada Logo
10:00 am - 10:35 pmLHR-SAT
18h 35m1 stop
$508Air Canada
Find Deal
Sun, Sep 21 - Tue, Oct 7
Iberia Logo
12:55 pm - 10:00 amSAT-LHR
15h 05m1 stop
Iberia Logo
11:55 am - 8:51 pmLHR-SAT
14h 56m1 stop
$519Iberia
Find Deal
Tue, Nov 4 - Thu, Nov 20
Delta Logo
11:35 am - 10:15 amSAT-LHR
16h 40m1 stop
Delta Logo
11:30 am - 12:20 amLHR-SAT
18h 50m2 stops
$522Delta
Find Deal
Wed, Oct 1 - Wed, Oct 8
Delta Logo
11:35 am - 7:15 amSAT-LHR
13h 40m1 stop
Delta Logo
9:00 am - 10:42 pmLHR-SAT
19h 42m2 stops
$524Delta
Find Deal
Wed, Oct 1 - Wed, Oct 8
Iberia Logo
1:44 pm - 10:50 amSAT-LHR
15h 06m1 stop
Iberia Logo
12:00 pm - 7:43 pmLHR-SAT
13h 43m1 stop
$530Iberia
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Wed, Oct 1 - Wed, Oct 8
Virgin Atlantic Logo
7:30 am - 9:50 amSAT-LHR
20h 20m1 stop
Virgin Atlantic Logo
10:45 am - 12:31 amLHR-SAT
19h 46m1 stop
$571Virgin Atlantic
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Wed, Oct 22 - Sun, Nov 2
British Airways Logo
6:49 pm - 2:25 pmSAT-LHR
13h 36m1 stop
British Airways Logo
12:00 pm - 7:43 pmLHR-SAT
13h 43m1 stop
$581British Airways
Find Deal
Fri, Sep 26 - Wed, Oct 8
Virgin Atlantic Logo
4:51 pm - 2:35 pmSAT-LHR
15h 44m1 stop
Virgin Atlantic Logo
6:30 pm - 10:51 amLHR-SAT
22h 21m1 stop
$582Virgin Atlantic
Find Deal
Fri, Oct 10 - Fri, Oct 17
British Airways Logo
6:29 pm - 12:15 pmSAT-LHR
11h 46m1 stop
British Airways Logo
4:25 pm - 11:43 pmLHR-SAT
13h 18m1 stop
$610British Airways
Find Deal
Sun, Oct 5 - Sun, Oct 19

United Airlines flights from San Antonio to London Heathrow Airport

Our best United Airlines deals on San Antonio to London Heathrow Airport flight tickets
United Airlines
Oct 7
SAT2:25 pmSan Antonio
11h 15m
1 stop
LHR7:40 amLondon Heathrow
Oct 14
LHR9:30 amLondon Heathrow
32h 07m
2 stops
SAT11:37 amSan Antonio
$507
Find similar
United Airlines
Nov 19
SAT7:07 amSan Antonio
21h 43m
1 stop
LHR10:50 amLondon Heathrow
Dec 3
LHR1:25 pmLondon Heathrow
31h 43m
2 stops
SAT3:08 pmSan Antonio
$509
Find similar
United Airlines
Oct 13
SAT11:45 amSan Antonio
17h 50m
1 stop
LHR11:35 amLondon Heathrow
Oct 28
LHR11:10 amLondon Heathrow
30h 15m
2 stops
SAT12:25 pmSan Antonio
$515
Find similar

Virgin Atlantic flights from San Antonio to London Heathrow Airport

Our best Virgin Atlantic deals on San Antonio to London Heathrow Airport flight tickets
Virgin Atlantic
Oct 22
SAT7:30 amSan Antonio
20h 20m
1 stop
LHR9:50 amLondon Heathrow
Nov 2
LHR10:45 amLondon Heathrow
19h 46m
1 stop
SAT12:31 amSan Antonio
$571
Find similar
Virgin Atlantic
Oct 10
SAT4:51 pmSan Antonio
15h 44m
1 stop
LHR2:35 pmLondon Heathrow
Oct 17
LHR6:30 pmLondon Heathrow
22h 21m
1 stop
SAT10:51 amSan Antonio
$582
Find similar
Virgin Atlantic
Oct 25
SAT10:54 amSan Antonio
14h 21m
1 stop
LHR7:15 amLondon Heathrow
Nov 1
LHR8:00 pmLondon Heathrow
20h 51m
1 stop
SAT11:51 amSan Antonio
$602
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 September 11, 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

Tue 10/7

2:25 pm-7:40 am

1 stop11h 15m

London Heathrow

Tue 10/14

9:30 am-11:37 am

2 stops32h 07m

$507

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 9/21

9:50 am-7:40 am

1 stop15h 50m

London Heathrow

Tue 10/7

10:00 am-10:35 pm

1 stop18h 35m

$508

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 11/4

12:55 pm-10:00 am

1 stop15h 05m

London Heathrow

Thu 11/20

11:55 am-8:51 pm

1 stop14h 56m

$519

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 10/1

11:35 am-10:15 am

1 stop16h 40m

London Heathrow

Wed 10/8

11:30 am-12:20 am

2 stops18h 50m

$522

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 10/1

11:35 am-7:15 am

1 stop13h 40m

London Heathrow

Wed 10/8

9:00 am-10:42 pm

2 stops19h 42m

$524

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 10/1

1:44 pm-10:50 am

1 stop15h 06m

London Heathrow

Wed 10/8

12:00 pm-7:43 pm

1 stop13h 43m

$530

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 10/22

7:30 am-9:50 am

1 stop20h 20m

London Heathrow

Sun 11/2

10:45 am-12:31 am

1 stop19h 46m

$571

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 9/26

6:49 pm-2:25 pm

1 stop13h 36m

London Heathrow

Wed 10/8

12:00 pm-7:43 pm

1 stop13h 43m

$581

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 10/10

4:51 pm-2:35 pm

1 stop15h 44m

London Heathrow

Fri 10/17

6:30 pm-10:51 am

1 stop22h 21m

$582

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 10/5

6:29 pm-12:15 pm

1 stop11h 46m

London Heathrow

Sun 10/19

4:25 pm-11:43 pm

1 stop13h 18m

$610

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 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 $978 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 8% 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 September 2025, prices for San Antonio to London Heathrow Airport flights are approximately 46% 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 15m 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
6.6
7,361 reviews
Search British Airways flights
American AirlinesPriceFrom $571Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $581Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights
DeltaPriceFrom $649Free CancellationRating
7.9
7,960 reviews
Search Delta flights
IberiaPriceFrom $672Free CancellationRating
7.0
2,929 reviews
Search Iberia flights
Virgin AtlanticPriceFrom $688Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights

Traveling to a place near London?

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