Which layover airport offers the lowest fares from San Antonio to London Heathrow Airport?

Flights via Atlanta (ATL) offer the lowest average round-trip price of $655.

What airlines fly to London Heathrow Airport?

British Airways, American Airlines and Iberia are the top three most popular airlines that fly to London Heathrow Airport from San Antonio according to our data. British Airways is the first choice among our users, with 67% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 8 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from San Antonio to London Heathrow Airport?

Atlanta (ATL) has the shortest average layover time for this route: 1h 10m.

Which layover airport has the shortest travel time from San Antonio to London Heathrow Airport?

Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 11h 22m.

What is the cheapest airline that flies from San Antonio to London Heathrow?

United Airlines, KLM, and Aer Lingus are the most popular carriers operating from San Antonio to London Heathrow

Which airport is the most popular layover for flights between San Antonio and London Heathrow Airport?

Dallas (DFW) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

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?

As of May 2026, there are 6 operators available to choose from 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.

$331 Cheap Flights from San Antonio to London Heathrow Airport in 2026

Q: What is the typical price of a round-trip flight between San Antonio and London Heathrow Airport?

Prices are currently low for flights on this route. Typical prices usually range from $1,067 to $760. The lowest price recently found on this route was $869.

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Find the cheapest flights from San Antonio to London

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:45 pm - 8:15 am

SAT

LHR

12h 30m

1 stop

7:35 am - 7:41 pm

LHR

SAT

18h 06m

2 stops

$869Iberia

Tue, Oct 27 - Wed, Nov 4

2:45 pm - 10:00 am

SAT

LHR

14h 15m

1 stop

7:35 am - 7:41 pm

LHR

SAT

18h 06m

2 stops

$871Iberia

Tue, Oct 27 - Wed, Nov 4

2:45 pm - 8:15 am

SAT

LHR

12h 30m

1 stop

7:35 am - 7:41 pm

LHR

SAT

18h 06m

2 stops

$872Iberia

Tue, Oct 27 - Wed, Nov 4

12:24 pm - 7:30 am

SAT

LHR

14h 06m

1 stop

6:50 am - 8:06 pm

LHR

SAT

19h 16m

2 stops

$873United Airlines

Sun, Oct 25 - Wed, Nov 18

12:10 pm - 8:50 am

SAT

LHR

14h 40m

1 stop

6:30 am - 5:09 pm

LHR

SAT

16h 39m

2 stops

$874Delta

Wed, Sep 9 - Tue, Sep 22

1:40 pm - 10:00 am

SAT

LHR

14h 20m

2 stops

8:05 pm - 9:13 pm

LHR

SAT

31h 08m

2 stops

$876Multiple Airlines

Tue, Sep 15 - Thu, Oct 15

9:00 am - 9:35 am

SAT

LHR

18h 35m

1 stop

5:15 pm - 9:13 pm

LHR

SAT

33h 58m

2 stops

$877Air Canada

Tue, Oct 6 - Thu, Oct 22

2:10 pm - 1:05 pm

SAT

LHR

16h 55m

2 stops

6:30 am - 5:09 pm

LHR

SAT

16h 39m

2 stops

$878Delta

Wed, Aug 12 - Wed, Aug 19

12:15 pm - 10:20 am

SAT

LHR

16h 05m

2 stops

8:40 am - 8:10 pm

LHR

SAT

17h 30m

2 stops

$879Delta

Wed, Sep 9 - Tue, Sep 22

9:00 am - 10:00 am

SAT

LHR

19h 00m

2 stops

5:15 pm - 9:13 pm

LHR

SAT

33h 58m

2 stops

$880Air Canada

Tue, Oct 6 - Thu, Oct 22

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Iberia flights from San Antonio to London Heathrow Airport

Our best Iberia deals on San Antonio to London Heathrow Airport flight tickets

Iberia

Oct 27

SAT2:45 pmSan Antonio

12h 30m

1 stop

LHR8:15 amLondon Heathrow

Nov 4

LHR7:35 amLondon Heathrow

18h 06m

2 stops

SAT7:41 pmSan Antonio

$869

Iberia

Oct 27

SAT2:45 pmSan Antonio

14h 15m

1 stop

LHR10:00 amLondon Heathrow

Nov 4

LHR7:35 amLondon Heathrow

18h 06m

2 stops

SAT7:41 pmSan Antonio

$871

Iberia

Oct 27

SAT2:45 pmSan Antonio

12h 30m

1 stop

LHR8:15 amLondon Heathrow

Nov 4

LHR7:35 amLondon Heathrow

18h 06m

2 stops

SAT7:41 pmSan Antonio

$872

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 25

SAT12:24 pmSan Antonio

14h 06m

1 stop

LHR7:30 amLondon Heathrow

Nov 18

LHR6:50 amLondon Heathrow

19h 16m

2 stops

SAT8:06 pmSan Antonio

$873

United Airlines

Sep 26

SAT7:30 pmSan Antonio

34h 05m

1 stop

LHR11:35 amLondon Heathrow

Feb 8

LHR1:50 pmLondon Heathrow

51h 39m

2 stops

SAT11:29 amSan Antonio

$895

United Airlines

Aug 5

SAT2:15 pmSan Antonio

11h 30m

1 stop

LHR7:45 amLondon Heathrow

Aug 19

LHR12:05 pmLondon Heathrow

15h 08m

1 stop

SAT9:13 pmSan Antonio

$901

momondo Fare Finder

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

Quickest round-trip

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 10/27

2:45 pm-8:15 am

1 stop12h 30m

London Heathrow

Wed 11/4

7:35 am-7:41 pm

2 stops18h 06m

$869

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 10/27

2:45 pm-10:00 am

1 stop14h 15m

London Heathrow

Wed 11/4

7:35 am-7:41 pm

2 stops18h 06m

$871

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 10/27

2:45 pm-8:15 am

1 stop12h 30m

London Heathrow

Wed 11/4

7:35 am-7:41 pm

2 stops18h 06m

$872

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 10/25

12:24 pm-7:30 am

1 stop14h 06m

London Heathrow

Wed 11/18

6:50 am-8:06 pm

2 stops19h 16m

$873

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 9/9

12:10 pm-8:50 am

1 stop14h 40m

London Heathrow

Tue 9/22

6:30 am-5:09 pm

2 stops16h 39m

$874

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/15

1:40 pm-10:00 am

2 stops14h 20m

London Heathrow

Thu 10/15

8:05 pm-9:13 pm

2 stops31h 08m

$876

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 10/6

9:00 am-9:35 am

1 stop18h 35m

London Heathrow

Thu 10/22

5:15 pm-9:13 pm

2 stops33h 58m

$877

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 8/12

2:10 pm-1:05 pm

2 stops16h 55m

London Heathrow

Wed 8/19

6:30 am-5:09 pm

2 stops16h 39m

$878

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 9/9

12:15 pm-10:20 am

2 stops16h 05m

London Heathrow

Tue 9/22

8:40 am-8:10 pm

2 stops17h 30m

$879

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 10/6

9:00 am-10:00 am

2 stops19h 00m

London Heathrow

Thu 10/22

5:15 pm-9:13 pm

2 stops33h 58m

$880

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

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 $604. 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 $887 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 $608 on momondo.

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

You could potentially save up to 19% 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 May 2026, 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

Fastest flight time	11h 30m
Direct flights	None

The fastest flight from San Antonio to London Heathrow Airport takes 11h 30m

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 30m 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?
As of May 2026, there are 6 operators available to choose from 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?
momondo data reveals that the most frequently booked airline on the route from San Antonio to London Heathrow Airport is British Airways, representing 35% of all bookings. The subsequent popular airlines are United Airlines at 21%, American Airlines at 19%, and Delta at 12%.

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 Airlines	PriceFrom $529	Free Cancellation	Rating 7.4 9,686 reviews	Search United Airlines flights
Delta	PriceFrom $530	Free Cancellation	Rating 7.9 8,463 reviews	Search Delta flights
American Airlines	PriceFrom $530	Free Cancellation	Rating 7.1 11,677 reviews	Search American Airlines flights
British Airways	PriceFrom $556	Free Cancellation	Rating 6.7 7,940 reviews	Search British Airways flights
Virgin Atlantic	PriceFrom $600	Free Cancellation	Rating 7.4 688 reviews	Search Virgin Atlantic flights
Iberia	PriceFrom $611	Free Cancellation	Rating 7.0 3,209 reviews	Search Iberia 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.

An easier way to manage your London Heathrow Airport trip

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Cheap flights from San Antonio to London from $331

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 9/1. 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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Iberia flights from San Antonio to London Heathrow Airport

Our best Iberia deals on San Antonio to London Heathrow Airport flight tickets

United Airlines flights from San Antonio to London Heathrow Airport

Our best United Airlines deals on San Antonio to London Heathrow Airport flight tickets

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Use the filters below to find and compare flights from San Antonio to London Heathrow Airport that are best for you.

See travel insights to London from

How to get the cheapest flight ticket from San Antonio to London Heathrow Airport

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?

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

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

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

What is the cheapest airline that flies from San Antonio to London Heathrow?

What airlines fly to London Heathrow Airport?

Which airport is the most popular layover for flights between San Antonio and London Heathrow Airport?

Which layover airport offers the lowest fares from San Antonio to London Heathrow Airport?

Which layover airport has the shortest travel time from San Antonio to London Heathrow Airport?

Which layover airport has the shortest connection time from San Antonio to London Heathrow Airport?

When to book flights from San Antonio to London Heathrow Airport

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

Direct flights

Frequently asked questions about flying 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

Traveling to a place near London?

Why use momondo?

An easier way to manage your London Heathrow Airport trip

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