Cheap flights from San Antonio to London Heathrow Airport from £258

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 14/2. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
16 Oct — 23 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or August, booked 74 days in advance, depart on a Monday or Tuesday and return on a Saturday

Cheap flight deals from San Antonio to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Heathrow (LHR). 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 16 September 2025.

Round-trip from

£375

One-way from

£258

Popular in

June

Cheapest in

October

Average price

£584
Air Canada
  • Air Canada
  • 7/10-21/10
  • 4 total stops
  • 52h 18m total
  • San Antonio to London
Scandinavian Airlines
  • Scandinavian Airlines
  • 16/2
  • 2 total stops
  • 21h 30m total
  • San Antonio to London
Highest demand for flights based on searches. 16% potential increase in price (£101 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from San Antonio to Heathrow

Cheapest flights from San Antonio to Heathrow
Explore the most affordable flight options available from San Antonio to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Sun 5/1006:45SAT - LHR
2 stops17h 45mAir Canada
Tue 21/1014:05LHR - SAT
2 stops31h 28mAir Canada
Deal found 15/9£375
Wed 19/1111:40SAT - LHR
2 stops17h 10mUnited Airlines
Wed 3/1213:25LHR - SAT
2 stops31h 43mUnited Airlines
Deal found 15/9£378
Sat 11/1019:38SAT - LHR
2 stops28h 52mAir Canada
Tue 21/1014:05LHR - SAT
2 stops27h 53mAir Canada
Deal found 16/9£379
Sun 5/1006:45SAT - LHR
2 stops17h 45mAir Canada
Fri 24/1016:00LHR - SAT
2 stops29h 25mAir Canada
Deal found 15/9£380
Tue 4/1115:00SAT - LHR
1 stop11h 35mIberia
Thu 20/1114:10LHR - SAT
1 stop13h 39mIberia
Deal found 15/9£382
Sat 11/1019:38SAT - LHR
2 stops28h 52mAir Canada
Fri 24/1016:00LHR - SAT
2 stops29h 25mAir Canada
Deal found 15/9£383
Wed 1/1011:35SAT - LHR
1 stop18h 30mDelta
Wed 8/1009:00LHR - SAT
2 stops19h 42mDelta
Deal found 15/9£386
Tue 7/1012:02SAT - LHR
1 stop13h 13mDelta
Tue 21/1011:30LHR - SAT
2 stops17h 12mDelta
Deal found 16/9£386
Tue 4/1114:14SAT - LHR
2 stops14h 51mUnited Airlines
Thu 20/1112:00LHR - SAT
2 stops16h 56mUnited Airlines
Deal found 15/9£387
Wed 1/1011:11SAT - LHR
1 stop14h 29mBritish Airways
Wed 8/1008:20LHR - SAT
1 stop13h 27mBritish Airways
Deal found 15/9£388

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Antonio to Heathrow 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 16 September 2025.
Use the filters below to find and compare flights from San Antonio to London Heathrow Airport that are best for you.

Fly from

San Antonio

Fly to

Heathrow

Route

Depart

Return

Price

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 12/1

11:43-10:25

2 stops16h 42m

London Heathrow

Tue 20/1

06:50-20:56

2 stops20h 06m

£387

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 19/11

12:10-09:20

1 stop15h 10m

London Heathrow

Wed 3/12

10:45-00:33

1 stop19h 48m

£391

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 7/10

14:25-07:40

1 stop11h 15m

London Heathrow

Wed 22/10

09:30-22:35

2 stops19h 05m

£391

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 8/10

12:02-07:15

1 stop13h 13m

London Heathrow

Tue 21/10

11:45-22:42

1 stop16h 57m

£391

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 6/10

17:09-11:45

1 stop12h 36m

London Heathrow

Wed 22/10

09:30-22:35

2 stops19h 05m

£391

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 5/10

10:37-06:45

1 stop14h 08m

London Heathrow

Fri 24/10

11:45-22:42

1 stop16h 57m

£391

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 5/10

16:21-11:35

1 stop13h 14m

London Heathrow

Tue 21/10

09:30-22:35

2 stops19h 05m

£391

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 3/11

11:35-08:45

1 stop15h 10m

London Heathrow

Thu 13/11

15:50-00:33

1 stop14h 43m

£391

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 3/11

16:24-10:15

1 stop11h 51m

London Heathrow

Tue 11/11

12:05-19:37

1 stop13h 32m

£391

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sat 11/10

17:15-07:15

1 stop32h 00m

London Heathrow

Thu 23/10

15:15-23:07

1 stop13h 52m

£395

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 24 results
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Best time to book a flight from San Antonio to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

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

Use this chart to determine the optimal time to book a return flight from San Antonio to Heathrow. Price data was last updated on 12 September 2025.

The price you pay for your flight from San Antonio to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 74 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £112). Flying from San Antonio to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

What is the cheapest time of day to fly from SAT to LHR?

Find hourly flight availability from San Antonio to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 September 2025.

When flying from San Antonio to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 10% versus a flight in the morning.

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

Related info for your journey

Find useful and relevant information for your journey from San Antonio to Heathrow. 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 Heathrow?

    San Antonio (SAT), located 7.6 mi from the city center, is the airport you fly out of when you book flights from San Antonio to London Heathrow. 0 airlines have flights from San Antonio to London Heathrow on a regular basis. Booking flights from San Antonio to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

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

    A quick flight from San Antonio to London Heathrow Airport can take about 13h 13m. United Airlines provides one of the quickest options available for as low as £391. The distance from San Antonio to London Heathrow Airport is about 4967 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Antonio to Heathrow 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 Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £112). Flying from San Antonio to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
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Croydon
Hounslow
Slough
Gatwick
Northampton
Luton
Deal
Wembley
Ilford
Crawley
Hayes
Watford
Winchester
Chichester
Ipswich
Swindon
Dartford
Guildford
Brentford

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