STL - SAL

Find cheap flights from St. Louis to San Salvador

1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Salvador

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Salvador, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Salvador, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
Multiple Airlines
Sun 12/28
STL - SAL • multi-stop
Cheapest one-way
Multiple Airlines
Sun 12/28
STL - SAL • multi-stop
When to travel
January
Cheapest • 26% price drop
February
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Salvador!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to San Salvador (STL-SAL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to San Salvador that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to San Salvador

Multiple Airlines Logo
STL
-
SAL
1749 mimulti-stop
Multiple Airlines Logo
SAL
-
STL
1749 mimulti-stop
Multiple Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to San Salvador flights

Get data-powered insights and trends into flights from St. Louis to San Salvador to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from St. Louis to San Salvador?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to San Salvador, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to San Salvador is January, where tickets cost $423 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,187 and $671 respectively.

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Good to know

Low seasonJuly
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly and prices are also 4% lower on average.

When to book flights from St. Louis to San Salvador

Are your dates flexible? Find out the best times to travel from St. Louis to San Salvador based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to San Salvador

  • Do I need a passport to fly between St. Louis and San Salvador?

    Yes, you'll most likely have to show a valid passport before boarding the plane in St. Louis and on arrival in San Salvador.

  • Which aircraft models fly most regularly from St. Louis to San Salvador?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to San Salvador?

    Star Alliance is the only airline alliance operating flights between St. Louis and San Salvador.

  • How does KAYAK find such low prices on flights from St. Louis to San Salvador?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to San Salvador.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to San Salvador?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Salvador from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to San Salvador?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Salvador with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SAL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to San Salvador?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Salvador from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from St. Louis to San Salvador

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to San Salvador. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to San Salvador? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9113 reviews
7.7Boarding
8.1Crew
7.1Entertainment
7.3Comfort
6.6Food
Airline reviews

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

4.0 OkayJay, Dec 2025
ORD - JLN
Read more United Airlines reviews

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Sat next to a one year old. She crawled all over the place and made me laugh.

Not United Airlines' fault. It's ORL airport's fault.

Great flight. On time boarding. Smooth flight and on time arrival at EWR. The flight crew was marvelous and there was a great selection of movies on the entertainment system. Our bags were at the carousel before we got there. Another excellent flight from United.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

They did the one thing that really matters - got to Chicago early.

I liked the snacks and the flight attendants were friendly.

Gate agent at Frankfurt was terrible. She denied PRE boarding even as it was printed on the boarding pass. Refused to look at the boarding pass and literally shouting for no reason. Frankfurt airport has horrible and rude staff who avoids trying to answer any question at all. Overall, horrible experience.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Very turbulent trip made it pretty bearable, plus the lack of refreshments served and the lack of any air conditioning before takeoff which took an hour or more.

Everything you need to know for your flight from St. Louis to San Salvador

Information on your arrival and departure airports

St. Louis (STL)
San Salvador (SAL)