Cheap flights from San Juan Luis Munoz Marin to St Louis

Compare San Juan Luis Munoz Marin to St Louis flight deals

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Flight deals from San Juan Luis Munoz Marin to St Louis

Looking for a cheap last-minute deal or the best round-trip flight from San Juan Luis Munoz Marin Airport to St Louis Airport? If you want to travel next month, round-trip fares start from $299. Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from San Juan Luis Munoz Marin to St Louis

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

Direct flights from San Juan Luis Munoz Marin to St Louis

San Juan Luis Munoz Marin to St Louis: Alternative routes

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

San Juan to St Louis: Flight information

The things to know before you go.
Cheapest flight found$253
Cheapest month to flyAugust
Average flight time4 hrs, 48 mins
Most popular airlineSouthwest Airlines
Average flights per week1

Finding cheap flights from San Juan Luis Munoz Marin to St Louis: Frequently asked questions

The best price we found for a round-trip flight from San Juan Luis Munoz Marin to St Louis is $253. 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.
4 hours and 48 minutes is the average flight time from San Juan Luis Munoz Marin to St Louis.
Southwest Airlines flies direct from San Juan Luis Munoz Marin to St Louis.
There is one flight per week flying from San Juan Luis Munoz Marin to St Louis, as of May 2026.
The cheapest month to fly from San Juan Luis Munoz Marin to St Louis is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Juan Luis Munoz Marin Airport to St Louis Airport on Tuesday, August 11, 2026.
Yes – the average flight time is 4 hours and 48 minutes.
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 St Louis 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 St Louis 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 St Louis.

Traveling from Luis Munoz Marin International Airport (SJU) to Lambert-St. Louis International Airport (STL): what you need to know

  • The average duration of a direct flight from Luis Munoz Marin International Airport to Lambert-St. Louis International Airport is 5 hours 5 minutes.

  • St Louis's timezone is UTC-5, which makes St Louis one hour behind San Juan.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This will give you plenty of time to board your SJU to STL flight.

  • During popular months such as July, it's a good idea to get to the airport earlier than usual. Plan to arrive two hours before domestic departures and four hours ahead of an international flight whenever you're traveling during a peak period in general.

  • Southwest Airlines is your gateway to exploring St Louis (and perhaps some other exciting corners of United States!). Check out the direct flights from Luis Munoz Marin International Airport to Lambert-St. Louis International Airport offered by this popular carrier.

  • The airline most travelers fly with on this route is Southwest Airlines.

  • The carrier with the best on-time arrival rate for SJU to STL flights is Southwest Airlines.

  • We make it simple to book a flight with a stopover. To see your options for tickets from Luis Munoz Marin International Airport to Lambert-St. Louis International Airport, deselect 'Direct flights only.' Then, choose a flight that has a stop long enough to visit your chosen city. Popular stopovers between SJU and STL include:

    • Tampa International Airport

    • Miami International Airport

    • Orlando International Airport

How to find the cheapest flights from Luis Munoz Marin International Airport (SJU) to Lambert-St. Louis International Airport (STL)

  • The lowest price we've seen for a one-way Luis Munoz Marin International Airport to Lambert-St. Louis International Airport flight is $148. A return fare is currently $253. Depending on the availability and when you book, these fares may change.

  • Score cheap tickets from SJU to STL by booking nine months ahead. Based on our research, that's the sweet spot for finding a bargain.

  • The cheapest month for flights from Luis Munoz Marin International Airport to Lambert-St. Louis International Airport is August. Use the 'Whole month' tool to see the lowest airfares if you have a flexible travel schedule.

  • Picking up cheap flights from SJU to STL is a breeze with Price Alerts. All you need to do is set up one of these automatic alerts and we'll notify you when a new deal comes up.

  • Secure the perfect flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from Luis Munoz Marin International Airport to Lambert-St. Louis International Airport, use the 'Sort by' tool. You can also filter results by departure and arrival times, airline, and journey duration.

Handy information about Luis Munoz Marin International Airport (SJU)

  • 73.65% of flights that leave from Luis Munoz Marin International Airport touch down at their destination on schedule.

  • Central San Juan to Luis Munoz Marin International Airport is approximately 8 kilometers. Depending on traffic, it'll take you about 10 minutes to get there if you're driving, catching a cab or ride-sharing.

  • The trip on public transport takes roughly 55 minutes.

  • Searching for a convenient hotel near SJU? If you're catching an early flight from Luis Munoz Marin International Airport to Lambert-St. Louis International Airport, these accommodation options will have you sleeping moments from check-in:

Arriving at Lambert-St. Louis International Airport (STL)

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

  • STL is located at 10701 Lambert International Blvd..

  • Lambert-St. Louis International Airport is approximately 26 kilometers from the center of St Louis. The drive time takes around 20 minutes.

  • It typically takes 35 minutes when traveling by public transport.

When to fly to Lambert-St. Louis International Airport (STL)

  • The quietest month for a flight from Luis Munoz Marin International Airport to Lambert-St. Louis International Airport is April, while July is the most popular. Choose the best time to visit St Louis based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • Before locking in your flight from Luis Munoz Marin International Airport to Lambert-St. Louis International Airport, think about the type of weather you enjoy. July is the warmest month in St Louis, with temperatures ranging from 17ºC (63ºF) to 33ºC (91ºF).

  • If you want to travel in cooler conditions, search for a cheap ticket from SJU to STL in January. Temperatures average between -8ºC (18ºF) and 7ºC (45ºF) then.

Explore more of United States

  • Chicago is just one of the many places in United States waiting to be discovered once you've seen St Louis. Around 418 kilometers away to the north-east, top sights here include Millennium Park, Art Institute of Chicago and LandShark Beer Garden at Navy Pier.

  • Around 370 kilometers east of St Louis, Indianapolis is another favorite stop in United States. Experience the best of this destination with a visit to The Children's Museum of Indianapolis, Indianapolis Museum of Art and Indianapolis Zoo.

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