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Cheap flights from San Antonio to London Heathrow Airport from £251

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
19 Jun — 26 Jun1
1 adult

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 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 14 June 2025.

Round-trip from

£461

One-way from

£251

Popular in

June

Cheapest in

October

Average price

£1,042
British Airways
  • British Airways
  • 19/11-3/12
  • 2 total stops
  • 25h 29m total
  • San Antonio to London
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12/8
  • 12/8
  • 2 total stops
  • 31h 20m total
  • San Antonio to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£91 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
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Average for round-trip flights in June 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 14 June 2025.

Wed 19/1116:40SAT - LHR
1 stop11h 45mBritish Airways
Wed 3/1215:45LHR - SAT
1 stop13h 44mBritish Airways
Deal found 13/6£461
Sat 20/918:49SAT - LHR
1 stop34h 01mIberia
Wed 8/1006:30LHR - SAT
2 stops18h 57mIberia
Deal found 13/6£463
Wed 19/1112:12SAT - LHR
1 stop12h 28mUnited Airlines
Wed 3/1213:25LHR - SAT
2 stops31h 39mUnited Airlines
Deal found 13/6£464
Sat 20/912:57SAT - LHR
2 stops35h 33mAir Canada
Tue 7/1014:05LHR - SAT
2 stops31h 53mAir Canada
Deal found 13/6£468
Mon 4/811:36SAT - LHR
1 stop13h 39mDelta
Wed 20/811:30LHR - SAT
2 stops18h 22mDelta
Deal found 13/6£474
Tue 19/818:11SAT - LHR
1 stop13h 19mKLM
Tue 30/912:25LHR - SAT
1 stop15h 04mKLM
Deal found 13/6£481
Mon 4/811:58SAT - LHR
2 stops15h 42mLufthansa
Wed 20/809:30LHR - SAT
2 stops17h 16mLufthansa
Deal found 13/6£488
Wed 29/1012:15SAT - LHR
1 stop13h 10mMultiple Airlines
Sun 9/1114:20LHR - SAT
1 stop15h 45mMultiple Airlines
Deal found 12/6£513
Tue 30/912:15SAT - LHR
2 stops27h 25mScandinavian Airlines
Fri 17/1006:40LHR - SAT
3 stops22h 41mScandinavian Airlines
Deal found 12/6£522
Tue 16/1216:40SAT - LHR
1 stop12h 50mAmerican Airlines
Tue 30/1214:55LHR - SAT
1 stop14h 10mAmerican Airlines
Deal found 13/6£592

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 14 June 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

Wed 19/11

16:40-10:25

1 stop11h 45m

London Heathrow

Wed 3/12

15:45-23:29

1 stop13h 44m

£461

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sat 20/9

18:49-10:50

1 stop34h 01m

London Heathrow

Wed 8/10

06:30-19:27

2 stops18h 57m

£463

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 19/11

12:12-06:40

1 stop12h 28m

London Heathrow

Wed 3/12

13:25-15:04

2 stops31h 39m

£464

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sat 20/9

12:57-06:30

2 stops35h 33m

London Heathrow

Tue 7/10

14:05-15:58

2 stops31h 53m

£468

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 4/8

11:36-07:15

1 stop13h 39m

London Heathrow

Wed 20/8

11:30-23:52

2 stops18h 22m

£474

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 19/8

18:11-13:30

1 stop13h 19m

London Heathrow

Tue 30/9

12:25-21:29

1 stop15h 04m

£481

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 4/8

11:58-09:40

2 stops15h 42m

London Heathrow

Wed 20/8

09:30-20:46

2 stops17h 16m

£488

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 29/10

12:15-06:25

1 stop13h 10m

London Heathrow

Sun 9/11

14:20-00:05

1 stop15h 45m

£513

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 30/9

12:15-21:40

2 stops27h 25m

London Heathrow

Fri 17/10

06:40-23:21

3 stops22h 41m

£522

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 12/8

07:00-20:20

2 stops31h 20m

£251

Flights are sorted by cheapest return flights first.

Deals found on 14/6

Showing 1-10 of 18 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 9 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 60 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 14 June 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.

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 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 14 June 2025.
Read reviews from past customers who have flown Delta, KLM and United Airlines from San Antonio to London. 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
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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!
Delta
8.0
Very Good
7,958 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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!
KLM
7.8
Good
1,360 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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!
United Airlines
7.4
Good
8,793 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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!
Virgin Atlantic
7.4
Good
652 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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!
Scandinavian Airlines
7.3
Good
1,388 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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. 1 airline 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?

    British Airways, at £461, was found to be the cheapest airline from San Antonio to London Heathrow Airport.Alternate airlines flying return to your destination include Iberia and United Airlines. British Airways is priced at 36% 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 Virgin Atlantic, which is currently one of the cheapest options available, starting at £287. United Airlines flights start at £294 while deals on Air Canada start at £299 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?

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Deal
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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 airline flying from San Antonio to Heathrow

Discover the top airline 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 858,174 searches. Data last updated 14 June 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£572Average£910FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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How does Cheapflights help users find flights from San Antonio to Heathrow?

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Can Cheapflights find flights from San Antonio to Heathrow with no change fees?

Yes! Cheapflights helps users easily find flights from San Antonio to Heathrow with no change fees.

Can Cheapflights notify me if prices for flights from San Antonio to Heathrow become cheaper?

Yes, Cheapflights offers price alerts on San Antonio to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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