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Cheap Flights from San Antonio International to London Heathrow

Compare San Antonio International to London Heathrow flight deals

Find the cheapest month or even day of the year to fly to London Heathrow

Book the best London Heathrow fare with no extra fees

Flight deals from San Antonio International to London Heathrow

Looking for a cheap last-minute deal or the best return flight from San Antonio International Airport to London Heathrow Airport? If you want to travel next month, return fares start from R 18,338. Find the lowest prices on one-way and return tickets right here.
London.R 5,440 per passenger.Departing Sun, 13 Sep.One-way flight with Air France.Outbound indirect flight with Air France, departs from San Antonio International on Sun, 13 Sep, arriving in London Heathrow.Price includes taxes and charges.From R 5,440, select.
London.R 5,444 per passenger.Departing Mon, 27 Jul.One-way flight with United.Outbound indirect flight with United, departs from San Antonio International on Mon, 27 Jul, arriving in London Heathrow.Price includes taxes and charges.From R 5,444, select.
London.R 5,455 per passenger.Departing Wed, 19 Aug.One-way flight with United.Outbound indirect flight with United, departs from San Antonio International on Wed, 19 Aug, arriving in London Heathrow.Price includes taxes and charges.From R 5,455, select.
London.R 5,456 per passenger.Departing Mon, 22 Mar.One-way flight with United.Outbound indirect flight with United, departs from San Antonio International on Mon, 22 Mar, arriving in London Heathrow.Price includes taxes and charges.From R 5,456, select.
London.R 5,463 per passenger.Departing Sun, 4 Oct.One-way flight with Air France.Outbound indirect flight with Air France, departs from San Antonio International on Sun, 4 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 5,463, select.
London.R 5,522 per passenger.Departing Sun, 15 Nov.One-way flight with Air France.Outbound indirect flight with Air France, departs from San Antonio International on Sun, 15 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 5,522, select.
London.R 5,542 per passenger.Departing Wed, 17 Feb.One-way flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Wed, 17 Feb, arriving in London Heathrow.Price includes taxes and charges.From R 5,542, select.
London.R 6,233 per passenger.Departing Tue, 15 Dec.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from San Antonio International on Tue, 15 Dec, arriving in London Heathrow.Price includes taxes and charges.From R 6,233, select.
London.R 6,838 per passenger.Departing Thu, 14 May.One-way flight with Breeze Airways.Outbound indirect flight with Breeze Airways, departs from San Antonio International on Thu, 14 May, arriving in London Heathrow.Price includes taxes and charges.From R 6,838, select.
London.R 8,433 per passenger.Departing Mon, 8 Jun.One-way flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from San Antonio International on Mon, 8 Jun, arriving in London Heathrow.Price includes taxes and charges.From R 8,433, select.

Find the cheapest month to fly from San Antonio International to London Heathrow

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Antonio International to London Heathrow flights are currently cheapest in September.
May
from R 6,838
Jun
from R 8,433
Jul
from R 5,444
Aug
from R 5,455
Sep
from R 5,440
Oct
from R 5,463
Nov
from R 5,522
Dec
from R 6,233
Jan
Find prices
Feb
from R 5,542
Mar
from R 5,456
Apr
Find prices

San Antonio International to London Heathrow: Alternative routes

Compare routes from San Antonio International to London below. You may find an airport to fly into that's cheaper, faster, or easier than London Heathrow.

London City

12km from central London
Closest
from R 5,802
Search flights

London Heathrow

23km from central London
Cheapest
from R 5,440
Search flights

London Gatwick

40km from central London
from R 5,600
Search flights

London Luton

45km from central London
from R 6,925
Search flights

London Stansted

49km from central London
from R 5,796
Search flights

London Southend

57km from central London
from R 8,040
Search flights

San Antonio to London: Flight information

The things to know before you go.
Cheapest flight foundR 5,440
Cheapest month to flySeptember

Finding cheap flights from San Antonio International to London Heathrow: Frequently asked questions

The best price we found for a return flight from San Antonio International to London Heathrow is R 14,493. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from San Antonio International to London Heathrow. But we found flights with one or more stops from R 14,493.
As of May 2026, there are no flights flying from San Antonio International to London Heathrow.
The cheapest month to fly from San Antonio International to London Heathrow is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Antonio International Airport to London Heathrow Airport on Monday, 14 September 2026.
No airlines currently offer direct flights between San Antonio International Airport and London Heathrow Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London Heathrow but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Iberia offers the cheapest flight tickets to London Heathrow.

Flying from San Antonio International Airport (SAT) to London Heathrow Airport (LHR): what you need to know

  • London is five hours ahead of San Antonio and observes the UTC+0 timezone.

  • Arrive at the airport on time so you don't miss your SAT to LHR flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.

  • During popular months such as July, it's best to get to the airport earlier than normal. Plan to arrive two hours before a domestic departure and four hours ahead for international flights when you travel during a high season in general.

  • Consider adding a stopover when booking your ticket from San Antonio International Airport to London Heathrow Airport. Simply deselect 'Direct flights only' to break up your journey, or even explore someplace new along the way. Here's where you can stop between SAT and LHR:

    • Baltimore/Wash International Thurgood Marshall Airport

    • Hartsfield-Jackson Atlanta International Airport

    • George Bush Intercontinental Airport

How to find the cheapest flights from San Antonio International Airport (SAT) to London Heathrow Airport (LHR)

  • At the moment, R 5,440 is the cheapest price we've found for a one-way San Antonio International Airport to London Heathrow Airport flight. The best price for a return plane ticket is R 14,493. Bear in mind that fares could change due to availability when booking.

  • To get your hands on cheap tickets from SAT to LHR, book early. Airlines typically offer lower fares when flights are first released.

  • Finding cheap flights from San Antonio International Airport to London Heathrow Airport is easier if you can be flexible with your trip dates. Use the 'Whole month' function to see the best prices throughout the month and bag a great deal.

  • Save time looking for cheap flights from SAT to LHR by setting up a Price Alert. You'll get an email or push notification on the app when a special offer becomes available.

  • Choose your ideal arrival and departure times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to find the best deals on flights from San Antonio International Airport to London Heathrow Airport.

Handy information about San Antonio International Airport (SAT)

  • You'll find SAT at 9800 Airport Boulevard.

  • San Antonio International Airport scores high marks for on-time performance. 83.17% of flights that take off from SAT land on time.

  • To reach San Antonio International Airport from central San Antonio, it takes about 20 minutes if you're travelling by car. Of course, this depends on traffic conditions. It's approximately 19 kilometres from the airport to the city centre.

  • Expect a trip time of about 1 hour 30 minutes when using public transport.

  • Get your break off to a stress-free start by staying near SAT. Whether you're taking an early flight from San Antonio International Airport to London Heathrow Airport or want to avoid feeling rushed, these hotels have you covered:

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • London Heathrow Airport is roughly 31 kilometres from central London. The drive time takes about 55 minutes.

  • Getting to the centre on public transport takes about 1 hour.

When to fly to London Heathrow Airport (LHR)

  • It's time to choose your travel dates for your flight from San Antonio International Airport to London Heathrow Airport. July is the busiest month to visit London. If you want a more laid-back vibe, go in February.

  • Book your flight from San Antonio International Airport to London Heathrow Airport for July if you'd like to visit London during its warmest month. Expect temperatures of between 11ºC (52ºF) and 26ºC (79ºF).

  • For cooler conditions, search for a cheap ticket from SAT to LHR in January. Average temperatures are between 0ºC (32ºF) and 9ºC (48ºF) then.

Explore more of United Kingdom

  • Birmingham is just one of the many cities in United Kingdom waiting to be discovered after you've experienced London. Around 161 kilometres away to the north-west, check out popular attractions including Cadbury World, The Library of Birmingham and National Sea Life Centre.

  • Around 177 kilometres west of London, Bristol is another favourite stop in United Kingdom. Get a taste of what this destination has to offer at Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.

Plan the rest of your trip from San Antonio to London

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.