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Cheap flights from San Antonio to London from £121

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LON
10 Sep — 17 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Antonio to London

Enter your travel dates to find the best prices.

Cheapest flights from San Antonio to London
Explore the most affordable flight options available from San Antonio to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 August 2026.

Tue 22/908:50 -
2 stops17h 15m
Wed 30/909:50 -
2 stops17h 23m
Deal found 10/8£379
Sat 19/908:50 -
2 stops17h 15m
Wed 30/909:50 -
2 stops17h 23m
Deal found 10/8£416
Sat 19/908:50 -
2 stops17h 15m
Mon 28/909:50 -
2 stops17h 23m
Deal found 10/8£453
Tue 8/908:50 -
2 stops17h 15m
Wed 16/909:50 -
2 stops17h 23m
Deal found 6/8£458
Thu 10/908:50 -
2 stops17h 15m
Wed 16/909:50 -
2 stops17h 23m
Deal found 6/8£495
Tue 1/908:50 -
2 stops17h 15m
Fri 18/909:50 -
2 stops17h 23m
Deal found 6/8£499
Tue 1/908:50 -
2 stops17h 15m
Wed 16/909:50 -
2 stops17h 23m
Deal found 8/8£504
Thu 10/908:50 -
2 stops17h 15m
Mon 14/909:50 -
2 stops17h 23m
Deal found 6/8£532
Tue 1/908:50 -
2 stops17h 15m
Mon 14/909:50 -
2 stops17h 23m
Deal found 8/8£541
Wed 23/910:03 -
1 stop17h 57m
Sun 27/914:00 -
2 stops35h 25m
Deal found 8/8£580
Wed 23/910:03 -
1 stop17h 57m
Thu 1/1014:00 -
1 stop25h 10m
Deal found 8/8£582
Mon 14/910:05 -
1 stop17h 55m
Mon 21/914:00 -
2 stops30h 20m
Deal found 7/8£598

Find flight deals from San Antonio to London

Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 11 August 2026.

Round-trip from

£379

One-way from

£121

Popular in

June

Cheapest in

November

Average price

£545
Aer Lingus
  • Aer Lingus
  • 22/9-30/9
  • 4 total stops
  • 34h 38m total
  • San Antonio to London
Search Deals
Aer Lingus
  • Aer Lingus
  • 22/9
  • 2 total stops
  • 17h 15m total
  • San Antonio to London
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (£196 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£32 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Antonio to London 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, Cheapflights users made 858,174 searches. Data last updated 11 August 2026.
Use the filters below to find and compare flights from San Antonio to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Wed 30/12

06:45-07:45

2 stops19h 00m

London Heathrow

Wed 13/1

10:00-23:20

2 stops19h 20m

£650

San AntonioLondon

SAT San Antonio - LGW London Gatwick

SATLGW

San Antonio

Wed 30/12

10:45-09:00

2 stops16h 15m

London Gatwick

Thu 14/1

10:00-23:20

2 stops19h 20m

£655

San AntonioLondon

SAT San Antonio - LGW London Gatwick

SATLGW

San Antonio

Wed 30/12

10:45-09:00

2 stops16h 15m

London Gatwick

Wed 13/1

10:00-22:27

2 stops18h 27m

£655

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Tue 22/9

05:30-06:25

1 stop18h 55m

London Heathrow

Fri 2/10

09:55-22:44

2 stops18h 49m

£656
Fastest return journey

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Wed 30/12

14:00-07:55

1 stop11h 55m

London Heathrow

Wed 13/1

11:35-21:07

1 stop15h 32m

£668

San AntonioLondon

SAT San Antonio - LCY London City

SATLCY

San Antonio

Mon 23/11

18:32-16:35

2 stops16h 03m

London City

Fri 27/11

07:45-23:25

2 stops21h 40m

£668

San AntonioLondon

SAT San Antonio - LGW London Gatwick

SATLGW

San Antonio

Thu 15/10

22:41-10:00

2 stops53h 19m

London Gatwick

Tue 20/10

14:00-09:39

1 stop25h 39m

£669

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Tue 27/10

16:29-09:00

1 stop11h 31m

London Heathrow

Wed 4/11

10:45-00:30

1 stop19h 45m

£678

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Tue 8/9

11:36-07:10

1 stop13h 34m

London Heathrow

Wed 16/9

09:55-21:22

2 stops17h 27m

£691

San AntonioLondon

SAT San Antonio - LHR London Heathrow

SATLHR

San Antonio

Mon 19/10

11:47-09:20

2 stops15h 33m

London Heathrow

Mon 26/10

06:50-22:53

2 stops21h 03m

£696

Flights are sorted by cheapest return flights first.

Deals found on 7/8

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from San Antonio to London

Have a flexible travel schedule? Discover the best time to fly to London from San Antonio with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Antonio to London

What is the cheapest month to book a flight from San Antonio to London?

Currently, February is the cheapest month in which you can book a flight from San Antonio to London (average of £507). Flying from San Antonio to London in June is currently the most expensive (average of £1,055). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from San Antonio to London?

Airfare is below average for this route at the moment.
San Antonio to London flights typically cost between £391 and £714 in September.
The cheapest return price found within the last 5 days was £379 on Aer Lingus (22 Sept–30 Sept).

What’s the top stopover airport for flights from San Antonio to London?

Share of one-stop return flights from San Antonio to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Houston (IAH) – chosen by Cheapflights users on 50% of one-stop itineraries from San Antonio to London on Cheapflights.

What’s the cheapest stopover airport for flights from San Antonio to London?

Average return fare for one-stop flights from San Antonio to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Houston (IAH) is the most affordable one-stop option, with an average return flight price of £373.

What’s the fastest stopover option from San Antonio to London?

Shortest average travel time for one-stop one-way flights from San Antonio to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Atlanta (ATL) have the shortest average one-way travel time for one-stop routes: 10h 45m.

Which airport typically offers the quickest stopover for flights from San Antonio to London?

Average stopover duration for one-stop one-way flights from San Antonio to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 04m.

How far ahead should I book a flight from San Antonio to London?

The best time to book flights from San Antonio to London is 20 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Related info for your journey

Find useful and relevant information for your journey from San Antonio to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Antonio to London?

    Most people fly from San Antonio (SAT) if they book a flight from San Antonio to London. On average, San Antonio has 0 outbound flights to London per day from 0 airlines. San Antonio is conveniently located just 7.6 mi from San Antonio’s city center.

  • How long is the flight from San Antonio to London?

    There are many flights that can get you from San Antonio to London in 11h 55m. Fly via Delta, United Airlines, or Lufthansa to get the fastest option. San Antonio and London are separated by a distance of 4967 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from San Antonio to London?

    The most popular flight routes from San Antonio to London are San Antonio - London Heathrow, San Antonio - London Gatwick and San Antonio - London City.

  • Can I find deals for flights from San Antonio to London that include hotel bookings?

    Yes. In addition to deals on San Antonio to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Antonio to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Antonio to London.

  • Can I find deals for business class flights from San Antonio to London?

    Yes. Cheapflights offers flight deals from San Antonio to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Antonio to London?

    Currently, February is the cheapest month in which you can book a flight from San Antonio to London (average of £507). Flying from San Antonio to London in June is currently the most expensive (average of £1,055). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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