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

For as low as $671, Scandinavian Airlines can have you in London Heathrow Airport from San Antonio in 14h 55m. 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 44% 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 American Airlines, British Airways or Delta 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.

$252+ 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 $787 in January. The cheapest round-trip price found within the last 3 days was $535 on Scandinavian Airlines (Jan 14-Jan 17).

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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

Cheap flight deals from San Antonio to Heathrow

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$535 (Gurufare)
One-way from	$252 (Mytrip)
Popular in	June
Cheapest in	October
Average price	$604

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. 16% potential increase in price ($188 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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 October 1, 2025.

Tue 10/284:51 pmSAT - LHR

2 stops19h 49mScandinavian Airlines

Mon 11/1010:20 amLHR - SAT

2 stops19h 57mScandinavian Airlines

Deal found 9/29

$580

Mon 12/82:48 pmSAT - LHR

2 stops19h 12mScandinavian Airlines

Sat 1/1010:20 amLHR - SAT

2 stops18h 57mScandinavian Airlines

Deal found 9/30

$595

Thu 10/3012:23 pmSAT - LHR

2 stops25h 07mScandinavian Airlines

Thu 11/66:40 pmLHR - SAT

2 stops35h 40mScandinavian Airlines

Deal found 9/30

$610

Fri 11/142:46 pmSAT - LHR

2 stops19h 14mScandinavian Airlines

Mon 11/176:40 amLHR - SAT

2 stops22h 36mScandinavian Airlines

Deal found 10/1

$633

Thu 11/272:46 pmSAT - LHR

3 stops24h 34mScandinavian Airlines

Tue 12/96:40 amLHR - SAT

2 stops23h 08mScandinavian Airlines

Deal found 9/28

$636

Fri 11/147:07 amSAT - LHR

1 stop21h 43mUnited Airlines

Mon 11/177:40 amLHR - SAT

2 stops17h 57mUnited Airlines

Deal found 10/1

$669

Sun 11/236:32 amSAT - LHR

1 stop18h 33mDelta

Sun 12/711:45 amLHR - SAT

2 stops18h 49mDelta

Deal found 10/1

$671

Wed 11/1911:50 amSAT - LHR

2 stops15h 30mDelta

Wed 12/36:30 amLHR - SAT

2 stops17h 56mDelta

Deal found 10/1

$675

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 1, 2025.

Mon 12/82:48 pmSAT - LHR

2 stops19h 12mScandinavian Airlines

Sat 1/1010:20 amLHR - SAT

2 stops18h 57mScandinavian Airlines

Deal found 9/30

$595

Wed 11/1911:50 amSAT - LHR

1 stop14h 55mDelta

Wed 12/38:40 amLHR - SAT

2 stops18h 39mDelta

Deal found 10/1

$671

Thu 1/154:25 pmSAT - LHR

1 stop13h 15mVirgin Atlantic

Mon 1/1910:00 amLHR - SAT

2 stops18h 19mVirgin Atlantic

Deal found 9/30

$679

Sun 11/232:14 pmSAT - LHR

1 stop14h 01mUnited Airlines

Mon 12/1512:05 pmLHR - SAT

1 stop13h 54mUnited Airlines

Deal found 10/1

$692

Mon 1/192:10 pmSAT - LHR

3 stops25h 10mScandinavian Airlines

Mon 2/910:20 amLHR - SAT

2 stops18h 57mScandinavian Airlines

Deal found 9/29

$610

Wed 11/1912:10 pmSAT - LHR

1 stop12h 45mDelta

Sun 12/148:55 amLHR - SAT

1 stop14h 22mDelta

Deal found 10/1

$692

Mon 11/2412:12 pmSAT - LHR

1 stop12h 28mUnited Airlines

Mon 12/1512:05 pmLHR - SAT

1 stop15h 27mUnited Airlines

Deal found 9/30

$692

Thu 11/272:46 pmSAT - LHR

3 stops24h 34mScandinavian Airlines

Wed 12/36:40 amLHR - SAT

2 stops23h 08mScandinavian Airlines

Deal found 9/28

$636

Tue 11/2511:50 amSAT - LHR

1 stop14h 55mDelta

Sat 12/138:55 amLHR - SAT

1 stop13h 48mDelta

Deal found 10/1

$692

Wed 11/194:24 pmSAT - LHR

1 stop11h 51mUnited Airlines

Sun 12/1410:00 amLHR - SAT

1 stop15h 59mUnited Airlines

Deal found 9/30

$692

Mon 2/22:10 pmSAT - LHR

3 stops20h 15mScandinavian Airlines

Fri 2/67:05 amLHR - SAT

3 stops22h 28mScandinavian Airlines

Deal found 9/30

$640

Mon 11/241:05 pmSAT - LHR

1 stop11h 20mDelta

Fri 12/121:05 pmLHR - SAT

2 stops17h 29mDelta

Deal found 10/1

$692

Last-minute flights from San Antonio to Heathrow
Discover last-minute flight deals from San Antonio to Heathrow. Data last updated October 1, 2025 and is based on user searches.

Tue 10/284:51 pmSAT - LHR

2 stops19h 49mScandinavian Airlines

Mon 11/1010:20 amLHR - SAT

2 stops19h 57mScandinavian Airlines

Deal found 9/29

$580

Thu 10/3012:23 pmSAT - LHR

2 stops25h 07mScandinavian Airlines

Thu 11/66:40 pmLHR - SAT

2 stops35h 40mScandinavian Airlines

Deal found 9/30

$610

Mon 11/311:35 amSAT - LHR

2 stops14h 05mDelta

Sun 11/166:30 amLHR - SAT

2 stops16h 48mDelta

Deal found 9/30

$681

Wed 11/51:23 pmSAT - LHR

2 stops20h 27mLufthansa

Wed 11/127:30 amLHR - SAT

2 stops18h 45mLufthansa

Deal found 9/30

$676

Fri 11/142:46 pmSAT - LHR

2 stops19h 14mScandinavian Airlines

Mon 11/176:40 amLHR - SAT

2 stops22h 36mScandinavian Airlines

Deal found 10/1

$633

Fri 11/147:07 amSAT - LHR

1 stop21h 43mUnited Airlines

Mon 11/177:40 amLHR - SAT

2 stops17h 57mUnited Airlines

Deal found 10/1

$669

Wed 11/1911:50 amSAT - LHR

2 stops15h 30mDelta

Wed 12/36:30 amLHR - SAT

2 stops17h 56mDelta

Deal found 10/1

$675

Sun 11/235:15 amSAT - LHR

1 stop19h 10mDelta

Mon 12/156:30 amLHR - SAT

2 stops16h 50mDelta

Deal found 9/30

$671

Thu 11/272:46 pmSAT - LHR

3 stops24h 34mScandinavian Airlines

Tue 12/96:40 amLHR - SAT

2 stops23h 08mScandinavian Airlines

Deal found 9/28

$636

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 1, 2025.

Sat 11/156:45 amSAT - LHR

2 stops30h 10mMultiple Airlines

Deal found 9/28

$252

Sat 11/84:10 pmSAT - LHR

2 stops19h 30mScandinavian Airlines

Deal found 9/29

$350

Thu 11/277:05 amSAT - LHR

2 stops18h 05mAir Canada

Deal found 9/30

$443

Sat 11/82:04 pmSAT - LHR

2 stops14h 21mUnited Airlines

Deal found 9/30

$448

Thu 11/277:05 amSAT - LHR

3 stops22h 15mUnited Airlines

Deal found 9/30

$454

Wed 11/191:40 pmSAT - LHR

1 stop16h 20mBritish Airways

Deal found 9/30

$463

Wed 11/1911:50 amSAT - LHR

2 stops15h 30mDelta

Deal found 9/30

$468

Wed 11/197:40 amSAT - LHR

3 stops17h 30mAir Canada

Deal found 9/30

$474

Sat 11/157:30 pmSAT - LHR

1 stop32h 45mUnited Airlines

Deal found 9/30

$480

Sun 12/282:13 pmSAT - LHR

1 stop11h 17mLufthansa

Deal found 10/1

$660

Sat 11/87:29 amSAT - LHR

3 stops17h 41mAir Canada

Deal found 9/30

$662

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 12/8

2:48 pm-4:00 pm

2 stops19h 12m

London Heathrow

Sat 1/10

10:20 am-11:17 pm

2 stops18h 57m

$595

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 1/19

2:10 pm-9:20 pm

3 stops25h 10m

London Heathrow

Mon 2/9

10:20 am-11:17 pm

2 stops18h 57m

$610

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 11/27

2:46 pm-9:20 pm

3 stops24h 34m

London Heathrow

Wed 12/3

6:40 am-11:48 pm

2 stops23h 08m

$636

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 2/2

2:10 pm-4:25 pm

3 stops20h 15m

London Heathrow

Fri 2/6

7:05 am-11:33 pm

3 stops22h 28m

$640

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/19

11:50 am-8:45 am

1 stop14h 55m

London Heathrow

Wed 12/3

8:40 am-9:19 pm

2 stops18h 39m

$671

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 1/15

4:25 pm-11:40 am

1 stop13h 15m

London Heathrow

Mon 1/19

10:00 am-10:19 pm

2 stops18h 19m

$679

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 11/23

2:14 pm-10:15 am

1 stop14h 01m

London Heathrow

Mon 12/15

12:05 pm-7:59 pm

1 stop13h 54m

$692

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/19

12:10 pm-6:55 am

1 stop12h 45m

London Heathrow

Sun 12/14

8:55 am-5:17 pm

1 stop14h 22m

$692

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 11/24

12:12 pm-6:40 am

1 stop12h 28m

London Heathrow

Mon 12/15

12:05 pm-9:32 pm

1 stop15h 27m

$692

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 11/25

11:50 am-8:45 am

1 stop14h 55m

London Heathrow

Sat 12/13

8:55 am-4:43 pm

1 stop13h 48m

$692

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/28

Showing 1-10 of 18 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, 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 $1,096). 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 14% 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

7,961 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

7,961 reviews

Delta

8.0

Very good

7,961 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

8,929 reviews

Delta

8.0

Very good

7,961 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

11,030 reviews

Delta

8.0

Very good

7,961 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

2,966 reviews

Delta

8.0

Very good

7,961 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

7,413 reviews

Delta

8.0

Very good

7,961 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 $671, Scandinavian Airlines can have you in London Heathrow Airport from San Antonio in 14h 55m. 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 44% 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 $1,096). 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.

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Top 6 airlines flying from San Antonio to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$530	Average$1,004	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$531	Average$913	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$568	Average$910	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$571	Average$960	FlexibilityNo cancel fee	On-time71%
Virgin Atlantic	Cheapest$645	Average$1,077	FlexibilityNo cancel fee	On-time72%
Iberia	Cheapest$672	Average$1,067	FlexibilityNo cancel fee	On-time77%

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$252+ 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 11/15. 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

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

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 1, 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 1, 2025.

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?

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Alternative routes for San Antonio to Heathrow

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Top 6 airlines flying from San Antonio to Heathrow

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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 1, 2025.