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Cheap flights from San Antonio to London from £274

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from San Antonio to London

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
07:20 - 11:50SAT  San Antonio-LHR London Heathrow
22h 30m2 stops San Francisco Vancouver Intl
United Airlines Logo
07:30 - 20:53LHR  London Heathrow-SAT San Antonio
19h 23m2 stops Frankfurt am Main Denver Intl
£551United Airlines
Tue, 17 Nov - Thu, 19 Nov
United Airlines Logo
05:30 - 11:15SAT  San Antonio-LHR London Heathrow
23h 45m3 stops Houston George Bush Intcntl Los Angeles San Francisco
United Airlines Logo
07:30 - 20:53LHR  London Heathrow-SAT San Antonio
19h 23m2 stops Frankfurt am Main Denver Intl
£554United Airlines
Tue, 17 Nov - Thu, 19 Nov
Iberia Logo
14:55 - 08:15SAT  San Antonio-LHR London Heathrow
11h 20m1 stop Dallas/Fort Worth
Iberia Logo
19:40 - 08:29LHR  London Heathrow-SAT San Antonio
18h 49m2 stops Madrid Barajas Dallas/Fort Worth
£620Iberia
Tue, 1 Dec - Wed, 9 Dec
Multiple Airlines Logo
10:00 - 07:10SAT  San Antonio-LHR London Heathrow
15h 10m2 stops Houston George Bush Intcntl Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
11:10 - 22:58LHR  London Heathrow-SAT San Antonio
17h 48m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl
£624Multiple Airlines
Tue, 1 Dec - Wed, 9 Dec
Iberia Logo
11:22 - 12:00SAT  San Antonio-LHR London Heathrow
18h 38m1 stop Dallas/Fort Worth
Iberia Logo
17:25 - 08:29LHR  London Heathrow-SAT San Antonio
21h 04m2 stops Madrid Barajas Dallas/Fort Worth
£627Iberia
Mon, 9 Nov - Mon, 16 Nov
Multiple Airlines Logo
07:30 - 07:10SAT  San Antonio-LHR London Heathrow
17h 40m2 stops Houston George Bush Intcntl Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
06:30 - 21:13LHR  London Heathrow-SAT San Antonio
20h 43m2 stops Frankfurt am Main Houston George Bush Intcntl
£632Multiple Airlines
Mon, 7 Dec - Thu, 10 Dec
Iberia Logo
07:10 - 16:05SAT  San Antonio-LHR London Heathrow
26h 55m2 stops Chicago O'Hare Intl Madrid Barajas
Iberia Logo
19:40 - 08:29LHR  London Heathrow-SAT San Antonio
18h 49m2 stops Madrid Barajas Dallas/Fort Worth
£633Iberia
Mon, 9 Nov - Mon, 16 Nov
United Airlines Logo
08:55 - 09:40SAT  San Antonio-LHR London Heathrow
18h 45m1 stop Denver Intl
United Airlines Logo
09:30 - 21:07LHR  London Heathrow-SAT San Antonio
17h 37m2 stops Frankfurt am Main Denver Intl
£636United Airlines
Mon, 7 Dec - Wed, 9 Dec
Iberia Logo
12:46 - 10:00SAT  San Antonio-LHR London Heathrow
15h 14m1 stop Dallas/Fort Worth
Iberia Logo
06:15 - 19:49LHR  London Heathrow-SAT San Antonio
19h 34m2 stops Madrid Barajas Dallas/Fort Worth
£639Iberia
Wed, 30 Dec - Thu, 14 Jan
Iberia Logo
12:46 - 06:50SAT  San Antonio-LHR London Heathrow
12h 04m1 stop Dallas/Fort Worth
Iberia Logo
07:35 - 19:49LHR  London Heathrow-SAT San Antonio
18h 14m2 stops Madrid Barajas Dallas/Fort Worth
£640Iberia
Wed, 30 Dec - Wed, 13 Jan

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Delta flights from San Antonio to London Heathrow Airport

Our best Delta deals on San Antonio to London Heathrow Airport flight tickets
Delta
15 Nov
SAT13:46San Antonio
12h 04m
1 stop
LHR07:50London Heathrow
27 Nov
LHR11:45London Heathrow
17h 40m
2 stops
SAT23:25San Antonio
£641
Delta
7 Dec
SAT12:53San Antonio
14h 32m
1 stop
LHR09:25London Heathrow
10 Dec
LHR06:30London Heathrow
17h 13m
2 stops
SAT17:43San Antonio
£641
Delta
30 Dec
SAT06:45San Antonio
19h 00m
2 stops
LHR07:45London Heathrow
13 Jan
LHR10:00London Heathrow
19h 20m
2 stops
SAT23:20San Antonio
£644

Lufthansa flights from San Antonio to London Heathrow Airport

Our best Lufthansa deals on San Antonio to London Heathrow Airport flight tickets
Lufthansa
26 Oct
SAT14:20San Antonio
19h 25m
2 stops
LHR14:45London Heathrow
10 Nov
LHR07:40London Heathrow
19h 13m
2 stops
SAT20:53San Antonio
£653
Lufthansa
17 Nov
SAT11:45San Antonio
21h 00m
2 stops
LHR14:45London Heathrow
23 Nov
LHR19:30London Heathrow
31h 56m
2 stops
SAT21:26San Antonio
£666
Lufthansa
17 Nov
SAT11:45San Antonio
21h 00m
2 stops
LHR14:45London Heathrow
23 Nov
LHR19:30London Heathrow
31h 56m
2 stops
SAT21:26San Antonio
£666

momondo Fare Finder

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

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Route

Depart

Return

Price

Cheapest return flight

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Tue 17/11

07:20-11:50

2 stops22h 30m

London Heathrow

Thu 19/11

07:30-20:53

2 stops19h 23m

£551

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Tue 17/11

05:30-11:15

3 stops23h 45m

London Heathrow

Thu 19/11

07:30-20:53

2 stops19h 23m

£554
Fastest return journey

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Tue 1/12

14:55-08:15

1 stop11h 20m

London Heathrow

Wed 9/12

19:40-08:29

2 stops18h 49m

£620

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Tue 1/12

10:00-07:10

2 stops15h 10m

London Heathrow

Wed 9/12

11:10-22:58

2 stops17h 48m

£624

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Mon 9/11

11:22-12:00

1 stop18h 38m

London Heathrow

Mon 16/11

17:25-08:29

2 stops21h 04m

£627

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Mon 7/12

07:30-07:10

2 stops17h 40m

London Heathrow

Thu 10/12

06:30-21:13

2 stops20h 43m

£632

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Mon 9/11

07:10-16:05

2 stops26h 55m

London Heathrow

Mon 16/11

19:40-08:29

2 stops18h 49m

£633

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Mon 7/12

08:55-09:40

1 stop18h 45m

London Heathrow

Wed 9/12

09:30-21:07

2 stops17h 37m

£636

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Wed 30/12

12:46-10:00

1 stop15h 14m

London Heathrow

Thu 14/1

06:15-19:49

2 stops19h 34m

£639

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Wed 30/12

12:46-06:50

1 stop12h 04m

London Heathrow

Wed 13/1

07:35-19:49

2 stops18h 14m

£640

Flights are sorted by cheapest return 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?

Prices are currently low for flights on this route.

Typical prices usually range from £553 to £818.
The lowest price recently found on this route was £551.

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

In general, October is the cheapest month to fly from San Antonio to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £542. The month of November is another great option to travel to London Heathrow Airport, with average flight prices from San Antonio averaging around £586.

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 £705 when searching weeks before you fly. 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 £488 on momondo.

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

As of August 2026, prices for San Antonio to London Heathrow Airport flights are approximately 16% 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 return 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

Best price found

£274

Fastest flight time

11h 30m

Direct flights

None
The best one-way flight to London Heathrow Airport from San Antonio in the past 72 hours is £274. The best return flight deal from San Antonio to London Heathrow Airport found on momondo in the last 72 hours is £551.
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?

    A flight from San Antonio to London Heathrow will travel around 4973.6 mi. In terms of flight time, this usually takes a little over 11h 30m.

  • 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 refresh daily.

  • 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 necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

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Canterbury
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Hayes
Guildford

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Antonio to London for you.

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

momondo does allow users to show only those flights to London from San Antonio which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between San Antonio 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 San Antonio to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from San Antonio are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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