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Cheap flights from San Antonio to London from $325

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 10/11. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from San Antonio to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
8:50 am - 8:05 am
SAT
-
LHR
17h 15m
2 stops
Aer Lingus Logo
7:40 am - 9:13 pm
LHR
-
SAT
19h 33m
2 stops
$545Aer Lingus
Tue, Aug 25 - Wed, Oct 21
Aer Lingus Logo
8:50 am - 8:05 am
SAT
-
LHR
17h 15m
2 stops
Aer Lingus Logo
7:40 am - 9:13 pm
LHR
-
SAT
19h 33m
2 stops
$566Aer Lingus
Thu, Aug 27 - Wed, Oct 21
Aer Lingus Logo
8:50 am - 8:05 am
SAT
-
LHR
17h 15m
2 stops
Aer Lingus Logo
7:40 am - 9:13 pm
LHR
-
SAT
19h 33m
2 stops
$624Aer Lingus
Tue, Aug 25 - Mon, Oct 19
Aer Lingus Logo
8:50 am - 8:05 am
SAT
-
LHR
17h 15m
2 stops
Aer Lingus Logo
7:40 am - 9:13 pm
LHR
-
SAT
19h 33m
2 stops
$645Aer Lingus
Thu, Aug 27 - Mon, Oct 19
Iberia Logo
12:41 pm - 9:05 am
SAT
-
LHR
14h 24m
1 stop
Iberia Logo
11:30 am - 10:50 pm
LHR
-
SAT
17h 20m
2 stops
$879Iberia
Wed, Sep 23 - Wed, Sep 30
Delta Logo
5:30 am - 6:25 am
SAT
-
LHR
18h 55m
1 stop
Delta Logo
9:55 am - 10:46 pm
LHR
-
SAT
18h 51m
2 stops
$883Delta
Tue, Sep 22 - Fri, Oct 2
Delta Logo
5:30 am - 6:25 am
SAT
-
LHR
18h 55m
1 stop
Delta Logo
9:55 am - 10:46 pm
LHR
-
SAT
18h 51m
2 stops
$884Delta
Tue, Sep 22 - Fri, Oct 2
Multiple Airlines Logo
1:00 pm - 10:00 am
SAT
-
LHR
15h 00m
2 stops
Multiple Airlines Logo
6:00 am - 9:13 pm
LHR
-
SAT
21h 13m
2 stops
$886Multiple Airlines
Tue, Sep 22 - Fri, Oct 2
Delta Logo
6:35 am - 7:10 am
SAT
-
LHR
18h 35m
2 stops
Delta Logo
6:30 am - 5:10 pm
LHR
-
SAT
16h 40m
2 stops
$887Delta
Tue, Sep 22 - Fri, Oct 2
Delta Logo
6:35 am - 7:10 am
SAT
-
LHR
18h 35m
2 stops
Delta Logo
6:30 am - 5:10 pm
LHR
-
SAT
16h 40m
2 stops
$888Delta
Tue, Sep 22 - Fri, Oct 2

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Aer Lingus flights from San Antonio to London Heathrow Airport

Our best Aer Lingus deals on San Antonio to London Heathrow Airport flight tickets
Aer Lingus
Aug 25
SAT8:50 amSan Antonio
17h 15m
2 stops
LHR8:05 amLondon Heathrow
Oct 21
LHR7:40 amLondon Heathrow
19h 33m
2 stops
SAT9:13 pmSan Antonio
$545
Aer Lingus
Aug 27
SAT8:50 amSan Antonio
17h 15m
2 stops
LHR8:05 amLondon Heathrow
Oct 21
LHR7:40 amLondon Heathrow
19h 33m
2 stops
SAT9:13 pmSan Antonio
$566
Aer Lingus
Aug 25
SAT8:50 amSan Antonio
17h 15m
2 stops
LHR8:05 amLondon Heathrow
Oct 19
LHR7:40 amLondon Heathrow
19h 33m
2 stops
SAT9:13 pmSan Antonio
$624

Iberia flights from San Antonio to London Heathrow Airport

Our best Iberia deals on San Antonio to London Heathrow Airport flight tickets
Iberia
Dec 30
SAT12:56 pmSan Antonio
13h 19m
1 stop
LHR8:15 amLondon Heathrow
Jan 14
LHR7:30 amLondon Heathrow
19h 19m
2 stops
SAT8:49 pmSan Antonio
$867
Iberia
Dec 30
SAT12:56 pmSan Antonio
13h 19m
1 stop
LHR8:15 amLondon Heathrow
Jan 14
LHR7:30 amLondon Heathrow
19h 19m
2 stops
SAT8:49 pmSan Antonio
$868
Iberia
Sep 23
SAT12:41 pmSan Antonio
14h 24m
1 stop
LHR9:05 amLondon Heathrow
Sep 30
LHR11:30 amLondon Heathrow
17h 20m
2 stops
SAT10:50 pmSan Antonio
$879

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 July 7, 2026.
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

Cheapest round-trip

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 8/25

8:50 am-8:05 am

2 stops17h 15m

London Heathrow

Wed 10/21

7:40 am-9:13 pm

2 stops19h 33m

$545

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 8/27

8:50 am-8:05 am

2 stops17h 15m

London Heathrow

Wed 10/21

7:40 am-9:13 pm

2 stops19h 33m

$566

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 8/25

8:50 am-8:05 am

2 stops17h 15m

London Heathrow

Mon 10/19

7:40 am-9:13 pm

2 stops19h 33m

$624

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 8/27

8:50 am-8:05 am

2 stops17h 15m

London Heathrow

Mon 10/19

7:40 am-9:13 pm

2 stops19h 33m

$645
Quickest round-trip

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 9/23

12:41 pm-9:05 am

1 stop14h 24m

London Heathrow

Wed 9/30

11:30 am-10:50 pm

2 stops17h 20m

$879

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/22

5:30 am-6:25 am

1 stop18h 55m

London Heathrow

Fri 10/2

9:55 am-10:46 pm

2 stops18h 51m

$883

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/22

5:30 am-6:25 am

1 stop18h 55m

London Heathrow

Fri 10/2

9:55 am-10:46 pm

2 stops18h 51m

$884

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/22

1:00 pm-10:00 am

2 stops15h 00m

London Heathrow

Fri 10/2

6:00 am-9:13 pm

2 stops21h 13m

$886

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/22

6:35 am-7:10 am

2 stops18h 35m

London Heathrow

Fri 10/2

6:30 am-5:10 pm

2 stops16h 40m

$887

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/22

6:35 am-7:10 am

2 stops18h 35m

London Heathrow

Fri 10/2

6:30 am-5:10 pm

2 stops16h 40m

$888

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 $580. If you’re not able to fly to London Heathrow Airport in October, then February is your next best option. Flight prices from San Antonio to London Heathrow Airport during February average around $656.

How far in advance should I book a flight from San Antonio 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 $893 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 $649 on momondo.

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

You could potentially save up to 45% 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 July 2026, prices for San Antonio to London Heathrow Airport flights are approximately 29% 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

Fastest flight time

11h 40m

Direct flights

None
The fastest flight from San Antonio to London Heathrow Airport takes 11h 40m
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.
Search flight deals

Frequently asked questions about flying from San Antonio to London Heathrow Airport

  • How far is San Antonio to London Heathrow by plane?

    There are 4973.6 mi between San Antonio and London Heathrow. 11h 40m 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
United AirlinesPriceFrom $529Free CancellationRating
7.4
9,945 reviews
Search United Airlines flights
DeltaPriceFrom $530Free CancellationRating
7.8
8,451 reviews
Search Delta flights
American AirlinesPriceFrom $530Free CancellationRating
7.1
11,782 reviews
Search American Airlines flights
British AirwaysPriceFrom $555Free CancellationRating
6.7
8,103 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $600Free CancellationRating
7.5
692 reviews
Search Virgin Atlantic flights

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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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