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$299+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or August, booked 90 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 August 14, 2025.

Round-trip from

$494
(lol.travel)

One-way from

$299
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$775
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. 7% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This Flighttix deal was found by Cheapflights users on 8/12. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/246:04 pmSAT - LHR
1 stop13h 06mVirgin Atlantic
Tue 9/91:05 pmLHR - SAT
1 stop13h 14mVirgin Atlantic
Deal found 8/12$507
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Wed 9/104:22 pmSAT - LHR
1 stop13h 13mUnited Airlines
Tue 9/169:30 amLHR - SAT
2 stops43h 28mUnited Airlines
Deal found 8/14$508
This Cheapflightsfares deal was found by Cheapflights users on 8/13. 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.
Wed 10/16:49 pmSAT - LHR
1 stop13h 36mBritish Airways
Wed 10/88:20 amLHR - SAT
1 stop13h 27mBritish Airways
Deal found 8/13$509
This Expedia deal was found by Cheapflights users on 8/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/236:35 pmSAT - LHR
1 stop29h 50mIberia
Wed 9/39:15 amLHR - SAT
2 stops19h 45mIberia
Deal found 8/13$510
This CheapOair deal was found by Cheapflights users on 8/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/155:30 amSAT - LHR
2 stops22h 05mAir Canada
Fri 10/245:40 pmLHR - SAT
2 stops35h 21mAir Canada
Deal found 8/11$513
This United Airlines deal was found by Cheapflights users on 8/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/217:10 amSAT - LHR
1 stop22h 25mUnited Airlines
Fri 10/34:00 pmLHR - SAT
2 stops25h 58mUnited Airlines
Deal found 8/12$515
This United Airlines deal was found by Cheapflights users on 8/13. 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 10/262:14 pmSAT - LHR
1 stop15h 01mUnited Airlines
Wed 11/56:35 amLHR - SAT
2 stops19h 40mUnited Airlines
Deal found 8/13$516
This oojo deal was found by Cheapflights users on 8/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/264:37 pmSAT - LHR
1 stop12h 23mBritish Airways
Wed 11/56:15 amLHR - SAT
2 stops21h 42mBritish Airways
Deal found 8/13$519
This Cheapflightsfares deal was found by Cheapflights users on 8/13. 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.
Wed 9/104:49 pmSAT - LHR
1 stop13h 41mBritish Airways
Wed 9/1710:30 amLHR - SAT
1 stop13h 17mBritish Airways
Deal found 8/13$520
This Delta deal was found by Cheapflights users on 8/12. 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.
Sun 8/248:00 amSAT - LHR
1 stop17h 15mDelta
Tue 9/911:30 amLHR - SAT
2 stops18h 27mDelta
Deal found 8/12$523
This Ovago deal was found by Cheapflights users on 8/14. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:49 pmSAT - LHR
1 stop11h 56mBritish Airways
Tue 9/1611:00 amLHR - SAT
1 stop14h 22mBritish Airways
Deal found 8/14$525

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 August 14, 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

Sun 8/24

6:04 pm-1:10 pm

1 stop13h 06m

London Heathrow

Tue 9/9

1:05 pm-8:19 pm

1 stop13h 14m

$507

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 8/24

11:46 am-5:55 am

1 stop12h 09m

London Heathrow

Tue 9/9

9:30 am-10:48 pm

2 stops19h 18m

$507

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 10/15

12:31 pm-6:25 am

1 stop11h 54m

London Heathrow

Fri 10/24

3:10 pm-10:39 pm

1 stop13h 29m

$507

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 9/10

4:22 pm-11:35 am

1 stop13h 13m

London Heathrow

Tue 9/16

9:30 am-10:58 pm

2 stops43h 28m

$508

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 8/27

12:57 pm-11:45 am

1 stop16h 48m

London Heathrow

Wed 9/3

2:05 pm-4:18 pm

2 stops32h 13m

$508

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 9/10

11:45 am-7:40 am

1 stop13h 55m

London Heathrow

Wed 9/17

9:30 am-10:58 pm

2 stops43h 28m

$508

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/19

11:40 am-7:30 am

1 stop13h 50m

London Heathrow

Wed 12/3

1:25 pm-11:00 pm

2 stops39h 35m

$508

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/19

12:55 pm-6:50 am

1 stop11h 55m

London Heathrow

Wed 12/3

2:55 pm-9:59 pm

1 stop13h 04m

$509

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 10/7

6:40 pm-12:45 pm

1 stop12h 05m

London Heathrow

Tue 11/25

8:20 am-5:00 pm

1 stop14h 40m

$509

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 10/1

6:49 pm-2:25 pm

1 stop13h 36m

London Heathrow

Wed 10/8

8:20 am-3:47 pm

1 stop13h 27m

$509

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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 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 August 8, 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 90 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 $1,097). 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 August 14, 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.

How much does it cost to fly round-trip from San Antonio to London Heathrow Airport?

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 August 14, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from San Antonio to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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!
Iberia
7.0
Good
2,882 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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!
British Airways
6.7
Okay
7,266 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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 $636. Other airlines that can offer you cheap pricing are Delta, from $649, and Iberia, from $672. British Airways is 35% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 $1,097). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Harrow
Canterbury
Dartford
Dover
Stratford-upon-Avon
Orpington
Watford
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Chelmsford
Southend-on-Sea
Folkestone
Chichester
Swindon

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Antonio to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$636Average$912FlexibilityNo cancel feeOn-time70%
DeltaCheapest$649Average$1,070FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$672Average$960FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$688Average$1,207FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$698Average$976FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$704Average$983FlexibilityNo cancel feeOn-time71%

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