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Cheap flights from San Antonio to London Heathrow Airport from £210

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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
25 Nov — 2 Dec1
1 adult
1 adult, Economy, 0 bags

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 26 October 2025.

Round-trip from

£445

One-way from

£210

Popular in

December

Cheapest in

October

Average price

£472
Delta
  • Delta
  • 8/12-23/12
  • 2 total stops
  • 30h 12m total
  • San Antonio to London
Search Deals
4/12
  • 4/12
  • 3 total stops
  • 38h 37m total
  • San Antonio to London
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£52 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£30 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from San Antonio to Heathrow

Enter your travel dates to find the best prices.

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 26 October 2025.

Tue 4/1112:23SAT - LHR
1 stop13h 27mKLM
Thu 20/1111:05LHR - SAT
1 stop16h 14mKLM
Deal found 25/10£443
Wed 3/1212:10SAT - LHR
1 stop12h 10mDelta
Wed 10/1211:30LHR - SAT
2 stops17h 27mDelta
Deal found 24/10£445
Tue 4/1112:23SAT - LHR
2 stops14h 22mDelta
Thu 20/1106:20LHR - SAT
2 stops16h 58mDelta
Deal found 24/10£448
Wed 3/1215:00SAT - LHR
2 stops13h 50mVirgin Atlantic
Wed 10/1211:30LHR - SAT
2 stops17h 27mVirgin Atlantic
Deal found 24/10£448
Wed 26/1115:00SAT - LHR
1 stop12h 00mKLM
Thu 4/1211:05LHR - SAT
1 stop16h 14mKLM
Deal found 25/10£450
Mon 1/1216:57SAT - LHR
1 stop12h 43mDelta
Sun 7/1208:40LHR - SAT
2 stops18h 39mDelta
Deal found 25/10£466
Mon 8/1216:52SAT - LHR
1 stop12h 48mKLM
Mon 15/1206:30LHR - SAT
2 stops16h 47mKLM
Deal found 23/10£467
Mon 8/1211:51SAT - LHR
2 stops16h 24mDelta
Mon 15/1208:40LHR - SAT
2 stops18h 39mDelta
Deal found 23/10£470
Sun 26/1012:12SAT - LHR
2 stops17h 33mLufthansa
Wed 5/1108:45LHR - SAT
2 stops20h 31mLufthansa
Deal found 25/10£472
Wed 26/1107:05SAT - LHR
2 stops18h 05mAir Canada
Thu 4/1213:00LHR - SAT
2 stops29h 28mAir Canada
Deal found 25/10£475
Mon 3/1116:24SAT - LHR
2 stops16h 21mUnited Airlines
Fri 14/1106:35LHR - SAT
2 stops19h 02mUnited Airlines
Deal found 24/10£479

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 26 October 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 8/12

11:36-09:00

1 stop15h 24m

London Heathrow

Tue 23/12

15:50-00:38

1 stop14h 48m

£445

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 3/12

12:10-06:20

1 stop12h 10m

London Heathrow

Wed 10/12

11:30-22:57

2 stops17h 27m

£445

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 7/12

12:10-09:20

1 stop15h 10m

London Heathrow

Tue 23/12

15:50-00:38

1 stop14h 48m

£445

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 10/12

15:00-11:40

1 stop14h 40m

London Heathrow

Tue 23/12

15:50-00:38

1 stop14h 48m

£445

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 26/11

14:00-11:25

1 stop15h 25m

London Heathrow

Thu 4/12

11:30-23:17

2 stops17h 47m

£445

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/12

13:06-09:00

1 stop13h 54m

London Heathrow

Tue 23/12

13:00-22:49

1 stop15h 49m

£445

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 19/11

12:10-10:15

1 stop16h 05m

London Heathrow

Wed 3/12

09:00-21:03

2 stops18h 03m

£445

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 8/12

14:48-09:00

1 stop12h 12m

London Heathrow

Wed 24/12

08:55-23:07

1 stop20h 12m

£445

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 10/12

13:06-11:40

1 stop16h 34m

London Heathrow

Wed 24/12

09:40-23:07

2 stops19h 27m

£445

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 3/12

11:51-09:20

2 stops15h 29m

London Heathrow

Wed 10/12

08:55-22:57

2 stops20h 02m

£448

Flights are sorted by cheapest return flights first.

Deals found on 24/10

Showing 1-10 of 19 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 17 October 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, September is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £396). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £653). 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 26 October 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 evening.

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 15h 10m. Delta provides one of the quickest options available for as low as £445. The distance from San Antonio to London Heathrow Airport is about 4967 mi.

  • 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, September is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £396). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £653). 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
Slough
Gatwick
Hounslow
Northampton
Luton
Wembley
Ilford
Deal
Hayes
Colchester
Watford
Crawley
Winchester
Swindon
Chichester
Romford
Ipswich
Bedford

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Fly with Cheapflights

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

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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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