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$354+ 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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
Oct 14 — Oct 211
Tue 10/14
Tue 10/21
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 74 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 September 14, 2025.

Round-trip from

$528
(Delta)

One-way from

$354
(Ovago)

Popular in

June

Cheapest in

October

Average price

$794
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. 16% potential increase in price ($186 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 14, 2025.

This Delta deal was found by Cheapflights users on 9/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2911:35 amSAT - LHR
2 stops15h 15mDelta
Wed 11/511:30 amLHR - SAT
2 stops18h 50mDelta
Deal found 9/13$528
This Trip.com deal was found by Cheapflights users on 9/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:16 amSAT - LHR
1 stop18h 24mUnited Airlines
Tue 10/72:10 pmLHR - SAT
1 stop14h 45mUnited Airlines
Deal found 9/13$529
This Virgin Atlantic deal was found by Cheapflights users on 9/13. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2112:23 pmSAT - LHR
2 stops13h 42mVirgin Atlantic
Thu 10/3011:45 amLHR - SAT
2 stops15h 57mVirgin Atlantic
Deal found 9/13$530
This Delta deal was found by Cheapflights users on 9/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/311:35 amSAT - LHR
1 stop15h 10mDelta
Fri 11/1412:30 pmLHR - SAT
1 stop16h 46mDelta
Deal found 9/14$532
This Virgin Atlantic deal was found by Cheapflights users on 9/13. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3012:40 pmSAT - LHR
1 stop15h 10mVirgin Atlantic
Tue 10/711:45 amLHR - SAT
2 stops18h 35mVirgin Atlantic
Deal found 9/13$536
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/227:16 amSAT - LHR
3 stops17h 14mMultiple Airlines
Wed 10/296:00 pmLHR - SAT
2 stops26h 18mMultiple Airlines
Deal found 9/13$545
This eDestinos deal was found by Cheapflights users on 9/13. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:12 pmSAT - LHR
1 stop15h 48mIberia
Fri 11/712:35 pmLHR - SAT
1 stop16h 03mIberia
Deal found 9/13$551
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Thu 10/307:05 amSAT - LHR
1 stop17h 50mUnited Airlines
Thu 11/131:25 pmLHR - SAT
2 stops39h 51mUnited Airlines
Deal found 9/12$559
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Mon 10/135:56 pmSAT - LHR
1 stop31h 44mUnited Airlines
Mon 10/208:30 amLHR - SAT
2 stops33h 28mUnited Airlines
Deal found 9/13$566
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Sun 9/216:48 amSAT - LHR
1 stop17h 32mUnited Airlines
Sun 9/286:50 amLHR - SAT
2 stops19h 15mUnited Airlines
Deal found 9/14$571
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Fri 10/312:14 pmSAT - LHR
1 stop12h 16mUnited Airlines
Fri 11/74:20 pmLHR - SAT
2 stops22h 28mUnited Airlines
Deal found 9/13$575
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/264:48 pmSAT - LHR
1 stop13h 42mBritish Airways
Wed 10/811:00 amLHR - SAT
1 stop14h 25mBritish Airways
Deal found 9/14$576

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 September 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

Mon 11/3

4:24 pm-10:15 am

1 stop11h 51m

London Heathrow

Tue 11/11

12:05 pm-7:37 pm

1 stop13h 32m

$532

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/30

12:40 pm-9:50 am

1 stop15h 10m

London Heathrow

Tue 10/7

11:45 am-12:20 am

2 stops18h 35m

$536

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 11/6

9:45 am-10:15 am

1 stop18h 30m

London Heathrow

Tue 11/11

1:25 pm-11:16 pm

2 stops39h 51m

$559

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 10/30

7:05 am-5:55 am

1 stop17h 50m

London Heathrow

Thu 11/13

1:25 pm-11:16 pm

2 stops39h 51m

$559

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 11/10

9:45 am-7:30 am

1 stop15h 45m

London Heathrow

Mon 11/17

1:25 pm-3:18 pm

2 stops31h 53m

$559

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 10/10

12:50 pm-7:15 am

1 stop12h 25m

London Heathrow

Thu 10/16

9:30 am-8:38 am

2 stops29h 08m

$582

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 11/6

2:14 pm-7:30 am

1 stop11h 16m

London Heathrow

Wed 11/12

12:05 pm-7:37 pm

1 stop13h 32m

$582

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 10/10

1:41 pm-9:40 am

1 stop13h 59m

London Heathrow

Wed 10/15

8:30 am-10:55 pm

1 stop20h 25m

$582

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 11/3

2:14 pm-7:30 am

1 stop11h 16m

London Heathrow

Mon 11/10

12:05 pm-7:37 pm

1 stop13h 32m

$582

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 11/4

2:14 pm-7:30 am

1 stop11h 16m

London Heathrow

Sun 11/9

12:05 pm-7:37 pm

1 stop13h 32m

$582

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

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 September 12, 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 74 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 September 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.

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 September 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
7,956 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

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
7,956 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

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
8,931 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

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
7,956 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

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
2,928 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

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
7,361 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

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.

  • How long is the flight from San Antonio to London Heathrow Airport?

    For as low as $536, Virgin Atlantic can have you in London Heathrow Airport from San Antonio in 15h 10m. There are 4967 mi between San Antonio and London Heathrow Airport. This flight may include one or multiple stops.

  • 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 $570. Other airlines that can offer you cheap pricing are American Airlines, from $571, and United Airlines, from $581. British Airways is 40% 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?

    $354 is the cheapest one-way deal found within the past few days, from Scandinavian Airlines. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $439 and $444, 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 $1,097). 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
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone

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 September 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$570Average$912FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$571Average$972FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$581Average$980FlexibilityNo cancel feeOn-time69%
DeltaCheapest$649Average$1,032FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$672Average$1,070FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$688Average$1,243FlexibilityNo cancel feeOn-time72%

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