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

For as low as $669, Scandinavian Airlines can have you in London Heathrow Airport from San Antonio in 21h 43m. 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 $530. Other airlines that can offer you cheap pricing are United Airlines, from $531, and British Airways, from $568. Delta is 45% cheaper than the average price of flights available within the next 90 days to this destination.

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.

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).

What are the most popular airlines that fly from San Antonio to London Heathrow Airport?

When booking a flight from San Antonio to London Heathrow Airport, you may want to consider flying on British Airways, United Airlines or American Airlines as they are the most popular for this route.

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.

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.

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.

$320+ Cheap Flights from San Antonio to London Heathrow Airport

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

Airfare is typical for this route at the moment. San Antonio to London Heathrow Airport flights typically cost between $532 and $965 in January. The cheapest round-trip price found within the last 3 days was $541 on Scandinavian Airlines (Jan 14-Jan 17).

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from San Antonio to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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

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 October 8, 2025.

Fri 11/142:46 pmSAT - LHR

2 stops36h 34mScandinavian Airlines

Mon 11/176:40 amLHR - SAT

2 stops23h 58mScandinavian Airlines

Deal found 10/8

$611

Fri 11/142:46 pmSAT - LHR

2 stops36h 34mScandinavian Airlines

Sun 11/166:40 pmLHR - SAT

2 stops35h 58mScandinavian Airlines

Deal found 10/6

$616

Mon 11/37:07 amSAT - LHR

1 stop21h 43mUnited Airlines

Mon 11/107:40 amLHR - SAT

2 stops17h 57mUnited Airlines

Deal found 10/5

$669

Fri 12/57:00 amSAT - LHR

1 stop16h 55mUnited Airlines

Tue 12/96:50 amLHR - SAT

2 stops19h 25mUnited Airlines

Deal found 10/5

$671

Wed 11/1911:50 amSAT - LHR

1 stop14h 55mDelta

Sun 12/76:30 amLHR - SAT

2 stops16h 50mDelta

Deal found 10/7

$672

Tue 12/211:51 amSAT - LHR

2 stops14h 14mVirgin Atlantic

Fri 12/126:30 amLHR - SAT

2 stops16h 47mVirgin Atlantic

Deal found 10/8

$676

Tue 11/412:23 pmSAT - LHR

1 stop13h 27mKLM

Thu 11/2012:30 pmLHR - SAT

1 stop13h 51mKLM

Deal found 10/7

$691

Wed 11/1912:10 pmSAT - LHR

1 stop16h 05mDelta

Wed 12/310:45 amLHR - SAT

1 stop16h 18mDelta

Deal found 10/8

$700

Tue 12/27:47 amSAT - LHR

3 stops17h 23mMultiple Airlines

Mon 12/81:25 pmLHR - SAT

2 stops27h 45mMultiple Airlines

Deal found 10/6

$706

Best flights from San Antonio to Heathrow
Discover carefully curated flight deals from San Antonio to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 8, 2025.

Mon 1/121:15 pmSAT - LHR

3 stops23h 35mScandinavian Airlines

Sat 1/176:40 amLHR - SAT

2 stops22h 53mScandinavian Airlines

Deal found 10/7

$607

Mon 11/37:07 amSAT - LHR

1 stop21h 43mUnited Airlines

Mon 11/107:40 amLHR - SAT

2 stops17h 57mUnited Airlines

Deal found 10/5

$669

Fri 11/1412:10 pmSAT - LHR

1 stop12h 45mDelta

Sun 11/1611:45 amLHR - SAT

2 stops18h 53mDelta

Deal found 10/6

$672

Tue 12/23:00 pmSAT - LHR

1 stop12h 00mKLM

Fri 12/126:30 amLHR - SAT

2 stops16h 47mKLM

Deal found 10/8

$672

Mon 1/192:10 pmSAT - LHR

3 stops22h 40mScandinavian Airlines

Mon 2/96:40 amLHR - SAT

2 stops22h 53mScandinavian Airlines

Deal found 10/8

$607

Fri 12/57:00 amSAT - LHR

1 stop16h 55mUnited Airlines

Tue 12/96:50 amLHR - SAT

2 stops19h 25mUnited Airlines

Deal found 10/5

$671

Wed 11/192:00 pmSAT - LHR

1 stop15h 25mDelta

Wed 12/36:30 amLHR - SAT

2 stops17h 56mDelta

Deal found 10/6

$672

Tue 1/274:10 pmSAT - LHR

3 stops23h 25mScandinavian Airlines

Tue 2/37:05 amLHR - SAT

3 stops22h 12mScandinavian Airlines

Deal found 10/7

$611

Fri 11/286:30 amSAT - LHR

2 stops18h 35mDelta

Sat 12/136:30 amLHR - SAT

2 stops18h 02mDelta

Deal found 10/6

$676

Mon 1/197:00 amSAT - LHR

1 stop17h 25mDelta

Mon 2/96:30 amLHR - SAT

2 stops19h 57mDelta

Deal found 10/8

$680

Last-minute flights from San Antonio to Heathrow
Discover last-minute flight deals from San Antonio to Heathrow. Data last updated October 8, 2025 and is based on user searches.

Wed 10/296:40 pmSAT - LHR

1 stop12h 00mMultiple Airlines

Tue 11/42:10 pmLHR - SAT

1 stop13h 47mMultiple Airlines

Deal found 10/7

$750

Mon 11/37:07 amSAT - LHR

1 stop21h 43mUnited Airlines

Mon 11/107:40 amLHR - SAT

2 stops17h 57mUnited Airlines

Deal found 10/5

$669

Tue 11/410:54 amSAT - LHR

2 stops15h 51mDelta

Thu 11/206:30 amLHR - SAT

2 stops16h 47mDelta

Deal found 10/7

$676

Tue 11/412:23 pmSAT - LHR

1 stop13h 27mKLM

Thu 11/2012:30 pmLHR - SAT

1 stop13h 51mKLM

Deal found 10/7

$691

Fri 11/142:46 pmSAT - LHR

2 stops36h 34mScandinavian Airlines

Mon 11/176:40 amLHR - SAT

2 stops23h 58mScandinavian Airlines

Deal found 10/8

$611

Fri 11/142:46 pmSAT - LHR

2 stops36h 34mScandinavian Airlines

Sun 11/166:40 pmLHR - SAT

2 stops35h 58mScandinavian Airlines

Deal found 10/6

$616

Wed 11/196:32 amSAT - LHR

1 stop18h 33mDelta

Wed 12/36:30 amLHR - SAT

2 stops16h 50mDelta

Deal found 10/8

$672

Wed 11/192:14 pmSAT - LHR

2 stops14h 51mUnited Airlines

Wed 12/31:25 pmLHR - SAT

2 stops31h 43mUnited Airlines

Deal found 10/7

$732

One-way flights from San Antonio to Heathrow
Search for one-way flight options from San Antonio to Heathrow. Find affordable one-way fares based on user searches. Data last updated October 8, 2025.

Sat 11/812:23 pmSAT - LHR

2 stops21h 37mScandinavian Airlines

Deal found 10/7

$344

Fri 10/177:10 pmSAT - LHR

3 stops59h 35mMultiple Airlines

Deal found 10/8

$348

Fri 11/214:54 pmSAT - LHR

2 stops37h 56mMultiple Airlines

Deal found 10/6

$363

Mon 12/18:33 pmSAT - LHR

3 stops58h 17mMultiple Airlines

Deal found 10/7

$376

Sat 11/2212:26 pmSAT - LHR

3 stops42h 24mMultiple Airlines

Deal found 10/6

$399

Mon 12/13:00 pmSAT - LHR

1 stop13h 00mIberia

Deal found 10/7

$463

Wed 12/3112:25 pmSAT - LHR

1 stop12h 15mUnited Airlines

Deal found 10/8

$468

Sat 11/87:30 pmSAT - LHR

1 stop30h 00mUnited Airlines

Deal found 10/7

$480

Cheap flight deals from San Antonio to Heathrow

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$541 (CheapOair)
One-way from	$344 (Justfly.com)
Popular in	December
Cheapest in	October
Average price	$628

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. 8% potential increase in price ($91 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($52 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Antonio to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 1/12

1:15 pm-6:50 pm

3 stops23h 35m

London Heathrow

Sat 1/17

6:40 am-11:33 pm

2 stops22h 53m

$607

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 1/19

2:10 pm-6:50 pm

3 stops22h 40m

London Heathrow

Mon 2/9

6:40 am-11:33 pm

2 stops22h 53m

$607

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 1/27

4:10 pm-9:35 pm

3 stops23h 25m

London Heathrow

Tue 2/3

7:05 am-11:17 pm

3 stops22h 12m

$611

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 11/3

7:07 am-10:50 am

1 stop21h 43m

London Heathrow

Mon 11/10

7:40 am-7:37 pm

2 stops17h 57m

$669

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 12/5

7:00 am-5:55 am

1 stop16h 55m

London Heathrow

Tue 12/9

6:50 am-8:15 pm

2 stops19h 25m

$671

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 11/14

12:10 pm-6:55 am

1 stop12h 45m

London Heathrow

Sun 11/16

11:45 am-12:38 am

2 stops18h 53m

$672

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 12/2

3:00 pm-9:00 am

1 stop12h 00m

London Heathrow

Fri 12/12

6:30 am-5:17 pm

2 stops16h 47m

$672

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/19

2:00 pm-11:25 am

1 stop15h 25m

London Heathrow

Wed 12/3

6:30 am-6:26 pm

2 stops17h 56m

$672

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 11/28

6:30 am-7:05 am

2 stops18h 35m

London Heathrow

Sat 12/13

6:30 am-6:32 pm

2 stops18h 02m

$676

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 1/19

7:00 am-6:25 am

1 stop17h 25m

London Heathrow

Mon 2/9

6:30 am-8:27 pm

2 stops19h 57m

$680

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/7

Showing 1-10 of 19 results

Compare providers for flights from San Antonio to Heathrow

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 October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy2 stars	Trust Score*1 star
oojo	Price Accuracy3 stars	Trust 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 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?

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, September is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of $527). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of $887). 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?

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 13% versus a flight in the evening.

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

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

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

7,969 reviews

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

7,969 reviews

Delta

8.0

Very good

7,969 reviews

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

8,965 reviews

Delta

8.0

Very good

7,969 reviews

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

11,042 reviews

Delta

8.0

Very good

7,969 reviews

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

2,980 reviews

Delta

8.0

Very good

7,969 reviews

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

7,443 reviews

Delta

8.0

Very good

7,969 reviews

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

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 $669, Scandinavian Airlines can have you in London Heathrow Airport from San Antonio in 21h 43m. 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 $530. Other airlines that can offer you cheap pricing are United Airlines, from $531, and British Airways, from $568. Delta is 45% 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, September is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of $527). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of $887). 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

Hounslow

Hayes

Ilford

Southend-on-Sea

Harrow

Canterbury

Croydon

Eastleigh

Dartford

Dover

Winchester

Orpington

Northampton

Gatwick

Borehamwood

Broadway

Aylesbury

Bedford

Chipping Norton

Wembley

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for San Antonio to Heathrow

Hobby to Heathrow flights

Dallas/Fort Worth to Heathrow flights

George Bush Intcntl to Heathrow flights

Hobby to Gatwick flights

Hobby to London City flights

Dallas/Fort Worth to Gatwick flights

Austin to Heathrow flights

George Bush Intcntl to Gatwick flights

Love Field to Heathrow flights

George Bush Intcntl to London City flights

Dallas/Fort Worth to London City flights

Dallas/Fort Worth to Stansted flights

Austin to Gatwick flights

Love Field to Gatwick flights

Dallas/Fort Worth to Luton flights

Austin to London City flights

San Antonio to Gatwick flights

Hobby to Luton flights

Austin to Stansted flights

San Antonio to London City flights

El Paso to Heathrow flights

Corpus Christi to Heathrow flights

El Paso to London City flights

McAllen to Heathrow flights

Midland to Heathrow flights

McAllen to London City flights

Harlingen to Heathrow flights

Abilene to Heathrow flights

Lubbock to Heathrow flights

Brownsville to Heathrow flights

College Station to Heathrow flights

El Paso to Gatwick flights

Love Field to London City flights

San Antonio to Stansted flights

Killeen to Heathrow flights

Midland to Gatwick flights

Hobby to Southend flights

McAllen to Gatwick flights

San Angelo to Heathrow flights

Texarkana to Heathrow flights

Lubbock to Gatwick flights

Other flights to Heathrow

Boston to Heathrow flights

John F Kennedy Intl to Heathrow flights

Newark to Heathrow flights

Miami to Heathrow flights

Dallas/Fort Worth to Heathrow flights

Raleigh to Heathrow flights

London Heathrow Airport to Paris Orly Airport flights

London Heathrow Airport to Inverness flights

London Heathrow Airport to Barcelona-El Prat Airport flights

London Heathrow Airport to Belfast City Airport flights

London Heathrow Airport to Luxembourg flights

London Heathrow Airport to Newcastle upon Tyne flights

London Heathrow Airport to Naples flights

London Heathrow Airport to Brussels Bruxelles-National Airport flights

London Heathrow Airport to Manchester flights

London Heathrow Airport to Hamburg flights

London Heathrow Airport to Toulouse flights

London Heathrow Airport to Cologne flights

London Heathrow Airport to Naples flights

London Heathrow Airport to Frankfurt am Main Airport flights

London Heathrow Airport to Cologne flights

London Heathrow Airport to Edinburgh flights

London Heathrow Airport to Stuttgart flights

London Heathrow Airport to Amsterdam flights

Top 6 airlines flying from San Antonio to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$530	Average$1,010	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$531	Average$930	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$568	Average$911	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$571	Average$960	FlexibilityNo cancel fee	On-time71%
Virgin Atlantic	Cheapest$645	Average$1,008	FlexibilityNo cancel fee	On-time72%
Iberia	Cheapest$672	Average$1,067	FlexibilityNo cancel fee	On-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$320+ 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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from San Antonio to Heathrow with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Find flight deals from San Antonio to Heathrow

Cheapest flights from San Antonio to HeathrowExplore 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 October 8, 2025.

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 October 8, 2025.

Cheap flight deals from San Antonio to Heathrow

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Antonio to London Heathrow Airport that are best for you.

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 October.

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.

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?

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

What is the cheapest time of day to fly from SAT to LHR?

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

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

Reviews of airlines servicing Heathrow

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?

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

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

Can I find deals for flights from San Antonio to Heathrow that include hotel bookings?

How can I find direct flights from San Antonio to Heathrow?

Can I find deals for business class flights from San Antonio to Heathrow?

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

Traveling to a place near London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Antonio to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from San Antonio to Heathrow

100% Free

Book with Flexibility

Travel Smart

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 October 8, 2025.