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$350+ 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 7/26. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
Apr 16 — Apr 231
Wed 4/16
Wed 4/23
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 April 11, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$677
(Cheapflightsfares)

One-way from

$350
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$845
Provider with most accurate pricing for San Antonio-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Antonio-London Heathrow flights.
Search Deals
From San Antonio to London Heathrow
Search Deals
One-way flight from San Antonio to London Heathrow
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($139 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 11, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/245:30 pmSAT - LHR
1 stop11h 20mIberia
Wed 10/112:00 pmLHR - SAT
1 stop17h 00mIberia
Deal found 4/10$677
This United Airlines deal was found by Cheapflights users on 4/10. 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.
Tue 5/134:53 pmSAT - LHR
1 stop13h 27mUnited Airlines
Tue 5/202:05 pmLHR - SAT
2 stops28h 07mUnited Airlines
Deal found 4/10$682
This FlightHub deal was found by Cheapflights users on 4/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/194:10 pmSAT - LHR
2 stops19h 30mScandinavian Airlines
Wed 12/310:20 amLHR - SAT
2 stops19h 01mScandinavian Airlines
Deal found 4/10$685
This Cheapflightsfares deal was found by Cheapflights users on 4/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/306:22 pmSAT - LHR
1 stop12h 23mBritish Airways
Wed 5/78:20 amLHR - SAT
1 stop14h 43mBritish Airways
Deal found 4/11$691
This Delta deal was found by Cheapflights users on 4/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/511:40 amSAT - LHR
2 stops15h 10mDelta
Tue 5/139:55 amLHR - SAT
2 stops18h 23mDelta
Deal found 4/11$697
This EaseMyTrip deal was found by Cheapflights users on 4/10. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/126:06 pmSAT - LHR
1 stop13h 04mVirgin Atlantic
Sat 8/2311:45 amLHR - SAT
1 stop17h 18mVirgin Atlantic
Deal found 4/10$702
This World Air Fares deal was found by Cheapflights users on 4/10. 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 World Air Fares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/126:06 pmSAT - LHR
1 stop11h 29mLufthansa
Sat 8/2311:05 amLHR - SAT
2 stops16h 12mLufthansa
Deal found 4/10$716
This Air Canada deal was found by Cheapflights users on 4/10. 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 5/137:44 amSAT - LHR
3 stops16h 46mMultiple Airlines
Tue 5/2012:05 pmLHR - SAT
2 stops16h 54mMultiple Airlines
Deal found 4/10$718
This StudentUniverse deal was found by Cheapflights users on 4/11. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/182:38 pmSAT - LHR
1 stop15h 52mFinnair
Mon 9/226:10 pmLHR - SAT
2 stops29h 32mFinnair
Deal found 4/11$733
This Air Canada deal was found by Cheapflights users on 4/10. 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.
Wed 5/217:00 amSAT - LHR
2 stops22h 50mAir Canada
Wed 5/2812:05 pmLHR - SAT
2 stops30h 18mAir Canada
Deal found 4/10$761

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 April 11, 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

Wed 9/24

5:30 pm-10:50 am

1 stop11h 20m

London Heathrow

Wed 10/1

12:00 pm-11:00 pm

1 stop17h 00m

$677

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 5/13

4:53 pm-12:20 pm

1 stop13h 27m

London Heathrow

Tue 5/20

2:05 pm-12:12 pm

2 stops28h 07m

$682

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 4/30

6:22 pm-12:45 pm

1 stop12h 23m

London Heathrow

Wed 5/7

8:20 am-5:03 pm

1 stop14h 43m

$691

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 5/5

11:40 am-8:50 am

2 stops15h 10m

London Heathrow

Tue 5/13

9:55 am-10:18 pm

2 stops18h 23m

$697

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 5/12

6:06 pm-1:10 pm

1 stop13h 04m

London Heathrow

Sat 8/23

11:45 am-11:03 pm

1 stop17h 18m

$702

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 5/12

6:06 pm-11:35 am

1 stop11h 29m

London Heathrow

Sat 8/23

11:05 am-9:17 pm

2 stops16h 12m

$716

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 5/13

7:44 am-6:30 am

3 stops16h 46m

London Heathrow

Tue 5/20

12:05 pm-10:59 pm

2 stops16h 54m

$718

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 9/18

2:38 pm-12:30 pm

1 stop15h 52m

London Heathrow

Mon 9/22

6:10 pm-5:42 pm

2 stops29h 32m

$733

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 5/21

7:00 am-11:50 am

2 stops22h 50m

London Heathrow

Wed 5/28

12:05 pm-12:23 pm

2 stops30h 18m

$761

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 5/15

4:00 pm-5:40 pm

2 stops19h 40m

London Heathrow

Mon 5/19

6:40 am-10:18 pm

3 stops21h 38m

$994

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Showing 1-10 of 20 results
1
2

Compare providers for flights from San Antonio to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Antonio to Heathrow in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightnetworkPrice Accuracy-Trust Score*3 stars
ScholarTripPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Antonio-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Antonio-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Antonio-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Antonio-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Antonio-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 April 4, 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 $1,110). 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 April 11, 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 April 11, 2025.
Read through reviews of airlines operating flights from San Antonio to London, such as Delta, KLM and Finnair. 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
7,911 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,911 reviews
Delta
8.0
Very good
7,911 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very good
7,911 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,269 reviews
Delta
8.0
Very good
7,911 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,636 reviews
Delta
8.0
Very good
7,911 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
641 reviews
Delta
8.0
Very good
7,911 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 $677. Other airlines that can offer you cheap pricing are United Airlines, from $682, and British Airways, from $684. Iberia is 29% 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?

    $451 is the cheapest one-way deal found within the past few days, from KLM. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from $457 and $462, 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 $1,110). 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
Hounslow
Hayes
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Luton
Horley
Wembley
Canterbury
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Dover
Gatwick
Orpington
Watford
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Northampton
Stratford-upon-Avon
Croydon
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Folkestone
Ilford
Broadway

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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 April 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$672Average$891FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$692Average$929FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$703Average$912FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$745Average$1,077FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$753Average$976FlexibilityNo cancel feeOn-time71%
DeltaCheapest$778Average$1,102FlexibilityNo cancel feeOn-timeN/A

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