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Cheap flights from San Antonio to London Heathrow Airport from £210

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
9 Jul — 16 Jul1
1 adult

Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or January, booked 58 days in advance, depart on a Monday or Tuesday and return on a Saturday

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 4 July 2025.

Round-trip from

£374

One-way from

£210

Popular in

June

Cheapest in

October

Average price

£804
Lufthansa
  • Lufthansa
  • 26/8-10/9
  • 4 total stops
  • 36h 36m total
  • San Antonio to London
Search Deals
4/9
  • 4/9
  • 2 total stops
  • 42h 00m total
  • San Antonio to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£88 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 4 July 2025.

Tue 26/807:15SAT - LHR
2 stops17h 15mMultiple Airlines
Wed 10/907:25LHR - SAT
2 stops19h 21mMultiple Airlines
Deal found 3/7£374
Mon 18/809:56SAT - LHR
1 stop15h 44mUnited Airlines
Wed 27/814:05LHR - SAT
2 stops31h 25mUnited Airlines
Deal found 3/7£375
Mon 25/818:45SAT - LHR
1 stop12h 00mIberia
Tue 9/909:15LHR - SAT
2 stops19h 45mIberia
Deal found 3/7£376
Mon 18/818:45SAT - LHR
1 stop12h 00mBritish Airways
Wed 27/815:10LHR - SAT
1 stop13h 02mBritish Airways
Deal found 3/7£383
Wed 6/805:30SAT - LHR
2 stops19h 00mAir Canada
Thu 28/809:30LHR - SAT
2 stops19h 29mAir Canada
Deal found 3/7£385
Wed 27/814:10SAT - LHR
2 stops15h 15mDelta
Wed 10/911:30LHR - SAT
2 stops18h 04mDelta
Deal found 3/7£389
Mon 4/812:24SAT - LHR
1 stop12h 21mKLM
Tue 26/809:20LHR - SAT
1 stop13h 46mKLM
Deal found 3/7£392

Cheapflights Fare Finder

Customise 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 858,174 searches. Data last updated 4 July 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

Tue 26/8

07:15-10:00

2 stops20h 45m

London Heathrow

Wed 10/9

07:25-20:46

2 stops19h 21m

£374

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 18/8

09:56-07:40

1 stop15h 44m

London Heathrow

Wed 27/8

14:05-15:30

2 stops31h 25m

£375

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 26/8

17:10-12:45

1 stop13h 35m

London Heathrow

Wed 10/9

15:10-22:13

1 stop13h 03m

£376

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 4/8

14:15-09:00

1 stop12h 45m

London Heathrow

Tue 26/8

18:45-22:59

2 stops34h 14m

£384

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 18/8

19:05-06:30

2 stops29h 25m

London Heathrow

Wed 27/8

09:30-15:30

2 stops36h 00m

£385

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 27/8

14:10-11:25

2 stops15h 15m

London Heathrow

Wed 10/9

11:30-23:34

2 stops18h 04m

£389

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 4/8

12:24-06:45

1 stop12h 21m

London Heathrow

Tue 26/8

09:20-17:06

1 stop13h 46m

£392

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 4/8

16:00-14:35

1 stop16h 35m

London Heathrow

Wed 20/8

15:15-23:57

1 stop14h 42m

£432

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 15/9

19:08-11:55

3 stops34h 47m

£251

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 26/8

06:30-10:00

2 stops21h 30m

£289

Flights are sorted by cheapest return flights first.

Deals found on 1/7

Showing 1-10 of 15 results
1
2

Best time to book a flight from San Antonio to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Antonio with our price prediction graph.
Estimated return 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 return flight from San Antonio to Heathrow. Price data was last updated on 27 June 2025.

The price you pay for your flight from San Antonio to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 58 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £112). Flying from San Antonio to London Heathrow Airport in August is currently the most expensive (average of £164). 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 4 July 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 midday, which can drop the price by up to 10% versus a flight in the morning.

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 4 July 2025.
Get a feel of what it's like to fly with Delta, KLM, andUnited Airlines from San Antonio to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
7,982 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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!
KLM
7.8
Good
1,367 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
8,844 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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!
Air Canada
7.1
Good
9,681 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
2,820 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from San Antonio to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Antonio to London Heathrow?

    San Antonio (SAT), located 7.6 mi from the city center, is the airport you fly out of when you book flights from San Antonio to London Heathrow. 0 airlines have flights from San Antonio to London Heathrow on a regular basis. Booking flights from San Antonio to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

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

    United Airlines, at £375, was found to be the cheapest airline from San Antonio to London Heathrow Airport.Alternate airlines flying return to your destination include Iberia and British Airways. United Airlines is priced at 47% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from San Antonio to London Heathrow Airport one-way?

    To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at £289. United Airlines flights start at £292 while deals on British Airways start at £339 one-way.

  • 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 holiday 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, January is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £112). Flying from San Antonio to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Travelling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
Hounslow
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