Cheap flights from San Antonio to London Heathrow Airport from £204

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 27/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
12 Oct — 19 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 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 12 September 2025.

Round-trip from

£375

One-way from

£204

Popular in

December

Cheapest in

October

Average price

£597
United Airlines
  • United Airlines
  • 9/12-17/12
  • 3 total stops
  • 53h 35m total
  • San Antonio to London
27/10
  • 27/10
  • 3 total stops
  • 46h 50m total
  • San Antonio to London
Highest demand for flights based on searches. 7% potential increase in price (£41 potential increase over avg. return price).
Cheapest flight prices on average. 5% potential price decrease (£26 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 12 September 2025.

Tue 9/1213:34SAT - LHR
1 stop14h 06mUnited Airlines
Wed 17/1213:25LHR - SAT
2 stops39h 29mUnited Airlines
Deal found 11/9£375
Mon 13/1009:47SAT - LHR
1 stop15h 53mUnited Airlines
Tue 28/1011:10LHR - SAT
2 stops30h 15mUnited Airlines
Deal found 11/9£381
Sun 26/1008:00SAT - LHR
1 stop20h 00mDelta
Wed 5/1111:30LHR - SAT
2 stops18h 50mDelta
Deal found 11/9£386
Mon 13/1018:39SAT - LHR
1 stop13h 46mIberia
Tue 28/1008:20LHR - SAT
1 stop18h 05mIberia
Deal found 11/9£389
Tue 30/911:26SAT - LHR
2 stops17h 34mDelta
Tue 7/1011:30LHR - SAT
2 stops18h 50mDelta
Deal found 12/9£389
Wed 1/1011:26SAT - LHR
2 stops15h 24mDelta
Wed 8/1011:30LHR - SAT
2 stops18h 50mDelta
Deal found 11/9£390
Sun 26/1018:24SAT - LHR
1 stop12h 11mBritish Airways
Wed 5/1108:20LHR - SAT
1 stop13h 16mBritish Airways
Deal found 11/9£392
Wed 8/1014:25SAT - LHR
1 stop11h 15mUnited Airlines
Fri 17/1010:00LHR - SAT
1 stop17h 29mUnited Airlines
Deal found 11/9£392
Mon 1/1214:14SAT - LHR
1 stop11h 16mUnited Airlines
Mon 8/1213:50LHR - SAT
2 stops51h 21mUnited Airlines
Deal found 11/9£393
Sun 26/1017:13SAT - LHR
2 stops21h 22mLufthansa
Wed 5/1106:35LHR - SAT
2 stops21h 14mLufthansa
Deal found 11/9£395
Wed 8/1006:00SAT - LHR
2 stops18h 30mAir Canada
Fri 17/1008:30LHR - SAT
2 stops30h 08mAir Canada
Deal found 11/9£398

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 12 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

Tue 9/12

13:34-09:40

1 stop14h 06m

London Heathrow

Wed 17/12

13:25-22:54

2 stops39h 29m

£375

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 26/10

08:00-09:00

1 stop20h 00m

London Heathrow

Wed 5/11

11:30-00:20

2 stops18h 50m

£386

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 19/11

11:50-08:05

2 stops14h 15m

London Heathrow

Wed 3/12

11:30-00:33

2 stops19h 03m

£389

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 8/10

05:30-07:40

1 stop20h 10m

London Heathrow

Wed 15/10

09:30-22:35

2 stops19h 05m

£392

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 30/10

07:05-05:55

1 stop17h 50m

London Heathrow

Thu 13/11

13:25-23:16

2 stops39h 51m

£412

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 26/10

14:26-07:20

1 stop11h 54m

London Heathrow

Sun 2/11

08:20-15:37

1 stop13h 17m

£429

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 10/10

12:50-07:15

1 stop12h 25m

London Heathrow

Thu 16/10

09:30-08:38

2 stops29h 08m

£429

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 27/10

16:30-09:40

1 stop12h 10m

London Heathrow

Mon 3/11

12:05-21:20

1 stop15h 15m

£429

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 7/11

07:40-07:30

1 stop17h 50m

London Heathrow

Tue 11/11

13:35-23:16

1 stop15h 41m

£429

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 27/10

17:45-21:35

3 stops46h 50m

£204

Flights are sorted by cheapest return flights first.

Deals found on 12/9

Showing 1-10 of 17 results
1
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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 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 12 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 14h 06m. United Airlines provides one of the quickest options available for as low as £375. 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
Winchester
Chichester
Ipswich
Swindon
Dartford
Eastbourne

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