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$404+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
May 4 — May 111
Sun 5/4
Sun 5/11
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 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$682
(FlightHub)

One-way from

$404
(Booking.com)

Popular in

June

Cheapest in

October

Average price

$875
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. 13% potential increase in price ($143 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 29, 2025.

This FlightHub deal was found by Cheapflights users on 4/28. 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.
Mon 9/154:10 pmSAT - LHR
2 stops19h 30mScandinavian Airlines
Wed 10/1510:20 amLHR - SAT
2 stops19h 01mScandinavian Airlines
Deal found 4/28$682
This StudentUniverse deal was found by Cheapflights users on 4/27. 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.
Mon 10/132:42 pmSAT - LHR
1 stop12h 18mFinnair
Mon 10/206:10 pmLHR - SAT
2 stops29h 36mFinnair
Deal found 4/27$750
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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.
Tue 10/74:34 pmSAT - LHR
1 stop12h 16mBritish Airways
Thu 10/163:30 pmLHR - SAT
1 stop14h 27mBritish Airways
Deal found 4/28$756
This United Airlines deal was found by Cheapflights users on 4/27. 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 11/192:01 pmSAT - LHR
1 stop11h 54mUnited Airlines
Wed 11/262:30 pmLHR - SAT
2 stops31h 08mUnited Airlines
Deal found 4/27$765
This Delta deal was found by Cheapflights users on 4/28. 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 10/54:25 pmSAT - LHR
1 stop15h 05mDelta
Tue 10/149:20 amLHR - SAT
1 stop13h 55mDelta
Deal found 4/28$788
This eDestinos deal was found by Cheapflights users on 4/28. 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 9/126:28 pmSAT - LHR
1 stop11h 47mIberia
Wed 9/242:25 pmLHR - SAT
1 stop15h 32mIberia
Deal found 4/28$820
This Air Canada deal was found by Cheapflights users on 4/28. 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.
Sun 10/195:30 amSAT - LHR
2 stops19h 00mAir Canada
Sun 10/263:00 pmLHR - SAT
2 stops29h 38mAir Canada
Deal found 4/28$821
This Air France deal was found by Cheapflights users on 4/27. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/144:25 pmSAT - LHR
1 stop12h 45mMultiple Airlines
Mon 9/299:20 amLHR - SAT
1 stop13h 55mMultiple Airlines
Deal found 4/27$832
This EaseMyTrip deal was found by Cheapflights users on 4/28. 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 5/1212:08 pmSAT - LHR
1 stop12h 37mVirgin Atlantic
Tue 8/191:05 pmLHR - SAT
1 stop17h 09mVirgin Atlantic
Deal found 4/28$908
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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 5/53:15 pmSAT - LHR
2 stops16h 40mAer Lingus
Tue 5/131:25 pmLHR - SAT
2 stops16h 25mAer Lingus
Deal found 4/28$938
This KLM deal was found by Cheapflights users on 4/28. 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.
Thu 5/86:19 pmSAT - LHR
1 stop13h 11mKLM
Tue 5/1311:45 amLHR - SAT
1 stop16h 30mKLM
Deal found 4/28$1,004
This American Airlines deal was found by Cheapflights users on 4/27. 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.
Wed 5/216:05 pmSAT - LHR
1 stop12h 25mAmerican Airlines
Wed 5/288:20 amLHR - SAT
1 stop14h 43mAmerican Airlines
Deal found 4/27$1,008

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 29, 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 9/15

4:10 pm-5:40 pm

2 stops19h 30m

London Heathrow

Wed 10/15

10:20 am-11:21 pm

2 stops19h 01m

$682

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 10/13

2:42 pm-9:00 am

1 stop12h 18m

London Heathrow

Mon 10/20

6:10 pm-5:46 pm

2 stops29h 36m

$750

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 10/7

4:34 pm-10:50 am

1 stop12h 16m

London Heathrow

Thu 10/16

3:30 pm-11:57 pm

1 stop14h 27m

$756

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sat 10/18

7:35 pm-11:35 am

1 stop34h 00m

London Heathrow

Fri 10/31

2:30 pm-3:38 pm

2 stops30h 08m

$770

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 10/5

10:45 am-7:15 am

1 stop14h 30m

London Heathrow

Fri 10/17

9:20 am-5:15 pm

1 stop13h 55m

$788

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 9/12

6:28 pm-12:15 pm

1 stop11h 47m

London Heathrow

Wed 9/24

2:25 pm-11:57 pm

1 stop15h 32m

$820

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 10/19

5:30 am-6:30 am

2 stops19h 00m

London Heathrow

Sun 10/26

3:00 pm-3:38 pm

2 stops29h 38m

$821

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 9/14

4:25 pm-11:10 am

1 stop12h 45m

London Heathrow

Mon 9/29

9:20 am-5:15 pm

1 stop13h 55m

$832

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 5/12

12:08 pm-6:45 am

1 stop12h 37m

London Heathrow

Tue 8/19

1:05 pm-12:14 am

1 stop17h 09m

$908

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 5/8

6:15 am-8:00 am

2 stops19h 45m

London Heathrow

Tue 5/13

1:25 pm-11:50 pm

2 stops16h 25m

$977

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 22 results
1
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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*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
oojoPrice Accuracy3 starsTrust Score*3 stars
FlightnetworkPrice Accuracy-Trust Score*3 stars
ScholarTripPrice Accuracy3 starsTrust Score*3 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on San Antonio-London Heathrow Airport flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 25, 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 29, 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 29, 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
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

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
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

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
1,333 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

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
1,273 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

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
8,696 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

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
642 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

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 $682. Other airlines that can offer you cheap pricing are Finnair, from $750, and British Airways, from $756. Scandinavian Airlines is 28% 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?

    $455 is the cheapest one-way deal found within the past few days, from Virgin Atlantic. You may also be able to find cheap deals on Air Canada and American Airlines, with prices starting from $464 and $483, 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
Hayes
Hounslow
Thornton Heath
Luton
Horley
Canterbury
Harrow
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Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Borehamwood
Folkestone
Ilford
Broadway
Aylesbury

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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$672Average$923FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$692Average$909FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$702Average$916FlexibilityNo cancel feeOn-time70%
DeltaCheapest$703Average$1,067FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$706Average$982FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$715Average$1,066FlexibilityNo cancel feeOn-time72%

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