Cheap flights from San Antonio to London Heathrow Airport from £217

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
23 7월 — 30 7월1
1 adult

Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or January, booked 84 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 18 7월 2025.

Round-trip from

£363

One-way from

£217

Popular in

December

Cheapest in

October

Average price

£842
United Airlines
  • United Airlines
  • 11/8-26/8
  • 2 total stops
  • 32h 54m total
  • San Antonio to London
9/8
  • 9/8
  • 2 total stops
  • 24h 32m total
  • San Antonio to London
Highest demand for flights based on searches. 4% potential increase in price (£28 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Average for round-trip flights in July 2025

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 18 7월 2025.

월 11/817:20SAT - LHR
1 stop12h 25mUnited Airlines
화 26/808:30LHR - SAT
1 stop20h 29mUnited Airlines
Deal found 17/7£363
화 19/807:15SAT - LHR
2 stops17h 15mAir Canada
수 3/909:30LHR - SAT
2 stops19h 28mAir Canada
Deal found 15/7£363
월 8/917:16SAT - LHR
1 stop13h 29mBritish Airways
화 16/908:20LHR - SAT
1 stop15h 27mBritish Airways
Deal found 17/7£380
화 26/818:45SAT - LHR
1 stop13h 40mIberia
화 2/918:45LHR - SAT
2 stops32h 06mIberia
Deal found 17/7£388
화 5/812:24SAT - LHR
1 stop12h 51mDelta
금 22/811:30LHR - SAT
2 stops16h 52mDelta
Deal found 17/7£389
목 14/811:33SAT - LHR
1 stop12h 52mVirgin Atlantic
목 21/813:05LHR - SAT
1 stop15h 23mVirgin Atlantic
Deal found 16/7£409

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 18 7월 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

월 11/8

17:20-11:45

1 stop12h 25m

London Heathrow

화 26/8

08:30-22:59

1 stop20h 29m

£363

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

화 19/8

07:15-06:30

2 stops17h 15m

London Heathrow

수 3/9

09:30-22:58

2 stops19h 28m

£363

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

월 8/9

17:16-12:45

1 stop13h 29m

London Heathrow

화 16/9

08:20-17:47

1 stop15h 27m

£380

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

화 26/8

18:45-14:25

1 stop13h 40m

London Heathrow

화 2/9

18:45-20:51

2 stops32h 06m

£388

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

화 5/8

12:24-07:15

1 stop12h 51m

London Heathrow

금 22/8

11:30-22:22

2 stops16h 52m

£389

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

목 14/8

11:33-06:25

1 stop12h 52m

London Heathrow

목 21/8

13:05-22:28

1 stop15h 23m

£409

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

토 9/8

11:13-17:45

2 stops24h 32m

£217

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

일 10/8

05:15-10:00

2 stops22h 45m

£273

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

일 10/8

12:55-11:45

1 stop16h 50m

£293

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

월 20/10

12:22-06:25

1 stop12h 03m

£300

Flights are sorted by cheapest return flights first.

Deals found on 17/7

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 11 July 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 83 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 18 7월 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 9% 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 18 7월 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.

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

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!
8.0
Very Good

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

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!

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

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!

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

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!

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

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!

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

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 £363, was found to be the cheapest airline from San Antonio to London Heathrow Airport.Alternate airlines flying return to your destination include Air Canada and British Airways. United Airlines is priced at 50% 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 £273. United Airlines flights start at £293 while deals on British Airways start at £300 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Hounslow
Deal
Northampton
Gatwick
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Wembley
Crawley
Eastbourne
Ilford
Hayes
Ipswich
Southend-on-Sea
Folkestone
Watford
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Swindon
Maidstone

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