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Cheap flights from San Antonio to London Heathrow Airport from £197

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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
7 Sep — 14 Sep1
1 adult

Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or August, booked 37 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 2 September 2025.

Round-trip from

£378

One-way from

£197

Popular in

December

Cheapest in

October

Average price

£598
Iberia
  • Iberia
  • 11/2-18/2
  • 3 total stops
  • 32h 11m total
  • San Antonio to London
Search Deals
3/10
  • 3/10
  • 2 total stops
  • 44h 18m total
  • San Antonio to London
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£41 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 2 September 2025.

Tue 4/1112:55SAT - LHR
1 stop11h 55mIberia
Thu 20/1114:10LHR - SAT
1 stop13h 47mIberia
Deal found 2/9£383
Mon 22/906:35SAT - LHR
1 stop18h 40mDelta
Fri 3/1011:30LHR - SAT
2 stops16h 49mDelta
Deal found 2/9£387
Wed 24/912:15SAT - LHR
1 stop19h 15mDelta
Tue 30/911:45LHR - SAT
2 stops18h 14mDelta
Deal found 2/9£388
Tue 11/1112:55SAT - LHR
1 stop11h 55mBritish Airways
Thu 20/1108:20LHR - SAT
1 stop13h 17mBritish Airways
Deal found 1/9£392
Wed 24/909:21SAT - LHR
1 stop16h 19mBritish Airways
Tue 30/909:15LHR - SAT
1 stop18h 07mBritish Airways
Deal found 2/9£392
Sat 15/1118:05SAT - LHR
1 stop30h 45mBritish Airways
Tue 25/1109:55LHR - SAT
1 stop18h 49mBritish Airways
Deal found 1/9£396
Tue 11/1110:33SAT - LHR
2 stops16h 42mIberia
Thu 20/1114:10LHR - SAT
1 stop13h 47mIberia
Deal found 1/9£403
Fri 17/1018:21SAT - LHR
1 stop13h 09mVirgin Atlantic
Fri 24/1009:55LHR - SAT
1 stop19h 51mVirgin Atlantic
Deal found 2/9£405
Fri 12/913:44SAT - LHR
1 stop15h 06mIberia
Wed 24/911:30LHR - SAT
2 stops17h 30mIberia
Deal found 2/9£415
Tue 11/1110:33SAT - LHR
2 stops16h 42mIberia
Fri 21/1119:40LHR - SAT
2 stops18h 44mIberia
Deal found 1/9£424
Fri 17/1005:14SAT - LHR
1 stop19h 31mDelta
Fri 24/1009:55LHR - SAT
2 stops16h 33mDelta
Deal found 2/9£425

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 2 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

Wed 11/2

14:36-10:00

1 stop13h 24m

London Heathrow

Wed 18/2

19:40-08:27

2 stops18h 47m

£378

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 4/11

12:55-06:50

1 stop11h 55m

London Heathrow

Thu 20/11

14:10-21:57

1 stop13h 47m

£383

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 22/9

06:35-07:15

1 stop18h 40m

London Heathrow

Fri 3/10

11:30-22:19

2 stops16h 49m

£387

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 4/11

12:02-06:20

1 stop12h 18m

London Heathrow

Thu 20/11

06:20-17:20

2 stops17h 00m

£387

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 24/9

12:15-13:30

1 stop19h 15m

London Heathrow

Tue 30/9

11:45-23:59

2 stops18h 14m

£388

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 19/11

13:40-07:20

1 stop11h 40m

London Heathrow

Wed 3/12

14:10-22:00

1 stop13h 50m

£391

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 26/10

18:39-12:15

1 stop12h 36m

London Heathrow

Wed 5/11

10:05-18:58

1 stop14h 53m

£391

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 22/9

17:16-10:50

1 stop11h 34m

London Heathrow

Fri 3/10

12:00-23:00

1 stop17h 00m

£392

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/2

14:08-08:35

1 stop12h 27m

London Heathrow

Wed 18/2

08:20-16:41

1 stop14h 21m

£392

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 30/9

12:44-06:25

1 stop11h 41m

London Heathrow

Tue 7/10

08:20-19:43

1 stop17h 23m

£392

Flights are sorted by cheapest return flights first.

Deals found on 2/9

Showing 1-10 of 17 results
1
2

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 29 August 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 37 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 2 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.

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 24m. Iberia provides one of the quickest options available for as low as £378. 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
Milton Keynes
Croydon
Hounslow
Gatwick
Slough
Northampton
Luton
Deal
Wembley
Ilford
Crawley
Hayes
Watford
Folkestone
Ipswich
Chichester
Winchester
Eastbourne
Swindon
Dartford

Browse thousands of different options on Cheapflights for your next trip

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Fly with Cheapflights

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How does Cheapflights help users find flights from San Antonio to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Antonio to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from San Antonio to Heathrow?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from San Antonio to Heathrow for you. Better yet — we are completely free to use.

Can Cheapflights find flights from San Antonio to Heathrow with no change fees?

Yes! Cheapflights helps users easily find flights from San Antonio to Heathrow with no change fees.

Can Cheapflights notify me if prices for flights from San Antonio to Heathrow become cheaper?

Yes, Cheapflights offers price alerts on San Antonio to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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