Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from San Antonio to London from £206

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to London departing on 20/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from San Antonio to London

Cheap return flights

United Airlines Logo
14:15 - 07:30SAT-LHR
11h 15m1 stop
United Airlines Logo
13:25 - 15:38LHR-SAT
32h 13m2 stops
£382United Airlines
Find Deal
Di, 6 Jan - Di, 13 Jan
United Airlines Logo
16:22 - 11:35SAT-LHR
13h 13m1 stop
United Airlines Logo
14:05 - 15:30LHR-SAT
31h 25m2 stops
£383United Airlines
Find Deal
Mi, 3 Sep - Di, 23 Sep
British Airways Logo
18:09 - 12:00SAT-LHR
11h 51m1 stop
British Airways Logo
16:30 - 23:48LHR-SAT
13h 18m1 stop
£384British Airways
Find Deal
Di, 6 Jan - Di, 13 Jan
Iberia Logo
18:49 - 14:25SAT-LHR
13h 36m1 stop
Iberia Logo
11:30 - 23:00LHR-SAT
17h 30m2 stops
£385Iberia
Find Deal
Mi, 24 Sep - Mi, 1 Okt
British Airways Logo
12:44 - 06:25SAT-LHR
11h 41m1 stop
British Airways Logo
10:30 - 18:37LHR-SAT
14h 07m1 stop
£385British Airways
Find Deal
Mi, 1 Okt - Mi, 8 Okt
Air Canada Logo
05:30 - 11:50SAT-LHR
24h 20m2 stops
Air Canada Logo
17:40 - 13:15LHR-SAT
25h 35m2 stops
£393Air Canada
Find Deal
So, 14 Sep - Fr, 26 Sep
Delta Logo
11:35 - 07:15SAT-LHR
13h 40m1 stop
Delta Logo
11:30 - 00:20LHR-SAT
18h 50m2 stops
£394Delta
Find Deal
Mi, 1 Okt - Mi, 8 Okt
Delta Logo
11:35 - 07:15SAT-LHR
13h 40m1 stop
Delta Logo
06:15 - 23:59LHR-SAT
23h 44m2 stops
£395Delta
Find Deal
So, 14 Sep - Di, 23 Sep
Iberia Logo
18:36 - 14:25SAT-LHR
13h 49m1 stop
Iberia Logo
12:00 - 22:13LHR-SAT
16h 13m1 stop
£400Iberia
Find Deal
So, 14 Sep - Mi, 24 Sep
Air Canada Logo
12:55 - 10:00SAT-LHR
15h 05m2 stops
Air Canada Logo
09:30 - 22:59LHR-SAT
19h 29m2 stops
£402Air Canada
Find Deal
Mo, 11 Aug - Mo, 25 Aug

Air Canada flights from San Antonio to London Heathrow Airport

Our best Air Canada deals on San Antonio to London Heathrow Airport flight tickets
Air Canada
14 Sept
SAT05:30San Antonio
24h 20m
2 stops
LHR11:50London Heathrow
26 Sept
LHR17:40London Heathrow
25h 35m
2 stops
SAT13:15San Antonio
£393
Find similar
Air Canada
11 Aug
SAT12:55San Antonio
15h 05m
2 stops
LHR10:00London Heathrow
25 Aug
LHR09:30London Heathrow
19h 29m
2 stops
SAT22:59San Antonio
£402
Find similar
Air Canada
1 Oct
SAT05:30San Antonio
19h 00m
2 stops
LHR06:30London Heathrow
8 Oct
LHR08:30London Heathrow
20h 25m
2 stops
SAT22:55San Antonio
£405
Find similar

United Airlines flights from San Antonio to London Heathrow Airport

Our best United Airlines deals on San Antonio to London Heathrow Airport flight tickets
United Airlines
6 Jan
SAT14:15San Antonio
11h 15m
1 stop
LHR07:30London Heathrow
13 Jan
LHR13:25London Heathrow
32h 13m
2 stops
SAT15:38San Antonio
£382
Find similar
United Airlines
3 Sept
SAT16:22San Antonio
13h 13m
1 stop
LHR11:35London Heathrow
23 Sept
LHR14:05London Heathrow
31h 25m
2 stops
SAT15:30San Antonio
£383
Find similar
United Airlines
2 Sept
SAT09:50San Antonio
15h 50m
1 stop
LHR07:40London Heathrow
16 Sept
LHR07:25London Heathrow
19h 08m
2 stops
SAT20:33San Antonio
£388
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from San Antonio to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 1 August 2025.
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

Di 6/1

14:15-07:30

1 stop11h 15m

London Heathrow

Di 13/1

13:25-15:38

2 stops32h 13m

£382

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mi 3/9

16:22-11:35

1 stop13h 13m

London Heathrow

Di 23/9

14:05-15:30

2 stops31h 25m

£383

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Di 6/1

18:09-12:00

1 stop11h 51m

London Heathrow

Di 13/1

16:30-23:48

1 stop13h 18m

£384

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mi 24/9

18:49-14:25

1 stop13h 36m

London Heathrow

Mi 1/10

11:30-23:00

2 stops17h 30m

£385

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mi 1/10

12:44-06:25

1 stop11h 41m

London Heathrow

Mi 8/10

10:30-18:37

1 stop14h 07m

£385

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

So 14/9

05:30-11:50

2 stops24h 20m

London Heathrow

Fr 26/9

17:40-13:15

2 stops25h 35m

£393

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mi 1/10

11:35-07:15

1 stop13h 40m

London Heathrow

Mi 8/10

11:30-00:20

2 stops18h 50m

£394

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

So 14/9

11:35-07:15

1 stop13h 40m

London Heathrow

Di 23/9

06:15-23:59

2 stops23h 44m

£395

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

So 14/9

18:36-14:25

1 stop13h 49m

London Heathrow

Mi 24/9

12:00-22:13

1 stop16h 13m

£400

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mo 11/8

12:55-10:00

2 stops15h 05m

London Heathrow

Mo 25/8

09:30-22:59

2 stops19h 29m

£402

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to London from

How to get the cheapest flight ticket from San Antonio to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London Heathrow Airport?

In general, October is the cheapest month to fly from San Antonio to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £531. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from San Antonio averaging around £598.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from San Antonio is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £753. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Friday is £1,313.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from San Antonio to London Heathrow Airport at midday for as low as £933. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £1,026 on average. Flights to London Heathrow Airport from San Antonio in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £741 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from San Antonio for as low as £621 on momondo.

How have San Antonio to London Heathrow Airport flight prices changed over time?

As of August 2025, prices for San Antonio to London Heathrow Airport flights are approximately 48% cheaper when compared to flights at the same time last year.

When to book flights from San Antonio to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from San Antonio to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap San Antonio to London Heathrow Airport (SAT to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Antonio to London Heathrow Airport

Best price found

£206

Fastest flight time

11h 15m

Direct flights

None
The best one-way flight to London Heathrow Airport from San Antonio in the past 72 hours is £206. The best return flight deal from San Antonio to London Heathrow Airport found on momondo in the last 72 hours is £382.
The fastest flight from San Antonio to London Heathrow Airport takes 11h 15m
There are no direct flights from San Antonio to London Heathrow Airport. Popular non-direct route for this connection is San Antonio Airport - London Heathrow Airport.
Search flight deals

  • How far is San Antonio to London Heathrow by plane?

    A flight from San Antonio to London Heathrow will travel around 4973.6 mi. In terms of flight time, this usually takes a little over 11h 15m.

  • When did momondo last update prices for flights from San Antonio Airport to London Heathrow Airport?

    Prices for flights from San Antonio Airport to London Heathrow Airport refresh daily.

  • How old do you have to be to fly from San Antonio Airport to London Heathrow Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Slough
Northampton
Southend-on-Sea
Maidstone
Swindon
Canterbury
Gatwick
Stratford-upon-Avon
Ipswich
Ilford
Dartford
Guildford
Colchester
Worthing
Hounslow
Swanage
Salisbury

Why use momondo?

Why should I use momondo to find a flight deal from San Antonio to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Antonio to London for you.

Can I find flights from San Antonio to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from San Antonio which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Antonio to London?

momondo helps you find the best flight between San Antonio and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from San Antonio to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from San Antonio are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mi 6/8
Mi 13/8
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London