Cheap flights from San Antonio to London from £251
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 12/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
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.Find the cheapest flights from San Antonio to London
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Virgin Atlantic flights from San Antonio to London Heathrow Airport
Our best Virgin Atlantic deals on San Antonio to London Heathrow Airport flight tickets
British Airways flights from San Antonio to London Heathrow Airport
Our best British Airways deals on San Antonio to London Heathrow Airport flight tickets
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 £518. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from San Antonio averaging around £579.
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 £734. 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 £1,280.
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 £910. 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 £1,001 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 8 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £720 when searching 8 weeks out.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 £637 on momondo.
When to book flights from San Antonio to London Heathrow Airport
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
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 10m.
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 many operators does momondo search for flights from San Antonio Airport to London Heathrow Airport?
There is 1 operator available for flights from San Antonio Airport to London Heathrow Airport as of June 2025.
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.
What is the most popular airline from San Antonio to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from San Antonio to London Heathrow Airport is British Airways (100% of total bookings).
Best airlines flying from San Antonio to London Heathrow Airport
Compare and see reviews for airlines that fly from San Antonio to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £571 | Free Cancellation | Rating 6.6 7,019 reviews |
Travelling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy 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.