429 € Cheap Flights from St Louis to San Salvador

Compare St Louis to San Salvador flight deals

Find the cheapest month or even day of the year to fly to San Salvador

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Flight deals from St Louis Airport to San Salvador Airport

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to San Salvador Airport? If you want to travel next month, return fares start from 444 €. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to San Salvador

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to San Salvador flights are currently cheapest in May.

St Louis to San Salvador: Alternative routes

Compare routes from St Louis to San Salvador below. You may find an airport to fly into that's cheaper, faster, or easier than San Salvador.

St Louis to San Salvador: Flight information

The things to know before you go.
Cheapest flight found429 €
Cheapest month to flyMay

Finding cheap flights from St Louis to San Salvador: Frequently asked questions

The best price we found for a return flight from St Louis to San Salvador is 429 €. 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 St Louis to San Salvador. But we found flights with one or more stops from 429 €.
As of March 2026, there are no flights flying from St Louis to San Salvador.
The cheapest month to fly from St Louis to San Salvador is usually May.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to San Salvador Airport on Wednesday, 6 May 2026.
No airlines currently offer direct flights between St Louis Airport and San Salvador 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 San Salvador 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 San Salvador is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to San Salvador.

Travelling from Lambert-St. Louis International Airport (STL) to El Salvador International Airport (SAL): what you need to know

  • San Salvador's timezone is UTC-6, which makes San Salvador one hour behind St Louis.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules to live by. Make sure you're at the airport on time to board your STL to SAL flight.

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

  • Think about adding a stopover when booking your ticket from Lambert-St. Louis International Airport to El Salvador International Airport. Just uncheck 'Direct flights only' to break up your trip, or maybe even explore a new city along the way. Check out these options between STL and SAL:

    • George Bush Intercontinental Airport

    • Dallas/Fort Worth International Airport

    • Cancun International Airport

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to El Salvador International Airport (SAL)

  • The lowest price we've found for a one-way Lambert-St. Louis International Airport to El Salvador International Airport flight is 176 €. A return ticket is currently 429 €. Depending on the availability and when you book, these fares can change.

  • To get your hands on cheap tickets from STL to SAL, book early. Airlines usually offer lower prices when flights are first released.

  • Finding cheap flights from Lambert-St. Louis International Airport to El Salvador International Airport is easy if you're flexible with your travel dates. Use the 'Whole month' function to see the lowest prices throughout the month and bag a great deal.

  • Spend less time searching for cheap flights from STL to SAL by creating a Price Alert. We'll send you an email or notification through the app when a new discounted fare appears.

  • Lock in the ideal flight for you with the help of the filters. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Lambert-St. Louis International Airport to El Salvador International Airport, use the 'Sort by' tool. You can also filter by airline, arrival and departure times, and number of stops.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at El Salvador International Airport (SAL)

Getting from El Salvador International Airport (SAL) to central San Salvador

  • From El Salvador International Airport, San Salvador is approximately 40 kilometres away. It takes around 40 minutes to reach the centre driving.

When to fly to El Salvador International Airport (SAL)

  • The quietest month for a flight from Lambert-St. Louis International Airport to El Salvador International Airport is February, while August is the busiest. Pick the ideal time to visit San Salvador based on whether you prefer a more fast-paced or easygoing experience.

  • Book your flight from Lambert-St. Louis International Airport to El Salvador International Airport for March if you'd like to go to San Salvador during its warmest month. Expect temperatures of between 19ºC (66ºF) and 32ºC (90ºF).

  • January sees average temperatures of between 18ºC (64ºF) and 30ºC (86ºF). Search for cheap tickets from STL to SAL sometime then if you want to travel when it's cooler.

Explore more of El Salvador

  • You've done San Salvador, now it's time to discover more of El Salvador. Travel about 8 kilometres north-east to Soyapango to check off its top attractions. From Parque de Ciudad Credisa to MONUMENTO A LOS HERMANOS CAIDOS and Zona verde (cancha, parque y casa comunal), you'll have a packed itinerary ahead.

  • Santa Ana is another standout destination in El Salvador and is around 48 kilometres north-west of San Salvador. No trip is complete without a visit to Planta seca, Secundario Condominios Procavia Park and San Cayetano Park.

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