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$286+ Cheap flights from San Antonio (SAT) to Heathrow (LHR)

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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or January, booked 60 days in advance, depart on a Thursday or Sunday and return on a Monday

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 June 12, 2025.

Round-trip from

$625
(Cheapflightsfares)

One-way from

$286
(Mytrip)

Popular in

June

Cheapest in

October

Average price

$1,413
From San Antonio to London Heathrow
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One-way flight from San Antonio to London Heathrow
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Highest demand for flights based on searches. 14% potential increase in price ($169 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 12, 2025.

This Orbitz deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/136:43 pmSAT - LHR
1 stop13h 42mBritish Airways
Mon 10/208:00 pmLHR - SAT
2 stops30h 02mBritish Airways
Deal found 6/12$640
This Cheapflightsfares deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:29 pmSAT - LHR
1 stop11h 46mIberia
Wed 10/152:25 pmLHR - SAT
1 stop15h 32mIberia
Deal found 6/12$675
This AirNGo deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/64:27 pmSAT - LHR
1 stop15h 03mVirgin Atlantic
Tue 7/221:05 pmLHR - SAT
1 stop17h 09mVirgin Atlantic
Deal found 6/11$693
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/67:30 amSAT - LHR
1 stop18h 10mUnited Airlines
Tue 7/229:30 amLHR - SAT
2 stops20h 29mUnited Airlines
Deal found 6/10$699
This Scandinavian Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3012:15 pmSAT - LHR
2 stops21h 45mScandinavian Airlines
Fri 10/1710:20 amLHR - SAT
2 stops19h 01mScandinavian Airlines
Deal found 6/12$701
This KLM deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/136:20 pmSAT - LHR
1 stop13h 10mKLM
Tue 7/2911:45 amLHR - SAT
1 stop16h 33mKLM
Deal found 6/10$704
This Delta deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/812:24 pmSAT - LHR
2 stops14h 51mDelta
Fri 8/16:30 amLHR - SAT
2 stops16h 42mDelta
Deal found 6/12$727
This Air Canada deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/27:15 amSAT - LHR
2 stops20h 20mAir Canada
Tue 9/168:30 amLHR - SAT
2 stops32h 07mAir Canada
Deal found 6/10$734
This Lufthansa deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/111:45 amSAT - LHR
2 stops20h 55mLufthansa
Tue 9/166:30 amLHR - SAT
2 stops20h 03mLufthansa
Deal found 6/10$763
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:45 pmSAT - LHR
1 stop11h 30mAmerican Airlines
Tue 12/302:55 pmLHR - SAT
1 stop14h 10mAmerican Airlines
Deal found 6/10$803
This Mytrip deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/216:13 pmSAT - LHR
3 stops33h 22mMultiple Airlines
Thu 10/29:30 amLHR - SAT
3 stops19h 55mMultiple Airlines
Deal found 6/11$805

Cheapflights Fare Finder

Customize 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 2,558,603 searches. Data last updated June 12, 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 8/12

3:00 pm-10:30 am

1 stop13h 30m

London Heathrow

Sat 8/23

4:25 pm-10:59 pm

1 stop12h 34m

$673

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 7/6

4:27 pm-1:30 pm

1 stop15h 03m

London Heathrow

Tue 7/22

1:05 pm-12:14 am

1 stop17h 09m

$693

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 7/6

7:30 am-7:40 am

1 stop18h 10m

London Heathrow

Tue 7/22

9:30 am-11:59 pm

2 stops20h 29m

$699

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 7/13

6:20 pm-1:30 pm

1 stop13h 10m

London Heathrow

Tue 7/29

11:45 am-10:18 pm

1 stop16h 33m

$704

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 8/31

1:08 pm-12:15 pm

1 stop17h 07m

London Heathrow

Wed 9/17

6:30 am-11:00 pm

2 stops22h 30m

$708

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 7/8

12:24 pm-9:15 am

2 stops14h 51m

London Heathrow

Fri 8/1

6:30 am-5:12 pm

2 stops16h 42m

$727

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/2

6:48 am-9:35 am

2 stops20h 47m

London Heathrow

Wed 9/17

2:05 pm-4:18 pm

2 stops32h 13m

$728

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 9/3

11:33 am-4:00 pm

2 stops22h 27m

London Heathrow

Wed 9/17

7:05 am-12:05 am

3 stops23h 00m

$741

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 9/1

11:45 am-2:40 pm

2 stops20h 55m

London Heathrow

Tue 9/16

6:30 am-8:33 pm

2 stops20h 03m

$763

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 8/26

2:50 pm-6:30 am

2 stops33h 40m

London Heathrow

Thu 9/4

8:40 am-5:04 am

3 stops26h 24m

$811

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 round-trip 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 round-trip flight from San Antonio to Heathrow. Price data was last updated on June 9, 2025.

To ensure you get the cheapest price possible for a flight from San Antonio to London Heathrow Airport, you should look to book at least 60 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, November is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of $661). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of $1,108). 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 June 12, 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 noon, which can drop the price by up to 14% versus a flight in the evening.

What is the cheapest day to fly from San Antonio to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from San Antonio to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Antonio to London Heathrow Airport flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated June 12, 2025.
Read through reviews of airlines operating flights from San Antonio to London, such as Delta, KLM and United Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Virgin Atlantic
7.4
Good
652 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.3
Good
1,387 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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?

    Located just 7.6 mi from the city center, San Antonio is the airport most travelers will use when flying to London Heathrow from San Antonio. Booking flights from San Antonio (SAT) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 6 different airlines.

  • What are the cheapest airlines flying from San Antonio to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from San Antonio to London Heathrow Airport round-trip from $625. Other airlines that can offer you cheap pricing are United Airlines, from $629, and Air Canada, from $635. British Airways is 36% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from San Antonio to London Heathrow Airport one-way?

    $406 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and Scandinavian Airlines, with prices starting from $410 and $454, respectively.

  • 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 vacation 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, November is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of $661). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of $1,108). 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

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Luton
Canterbury
Harrow
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Folkestone
Borehamwood
Broadway
Sutton
Aylesbury
Chelmsford
Brentwood

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Top 6 airlines flying from San Antonio to Heathrow

Discover the top 6 airlines that operate flights from San Antonio to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest$645Average$1,152FlexibilityNo cancel feeOn-time72%
DeltaCheapest$649Average$1,086FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$672Average$910FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$692Average$910FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$702Average$915FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$706Average$986FlexibilityNo cancel feeOn-time71%

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