$117 Find Cheap Flights from St. Louis to San Juan - Compare and Save

Among airlines operating St. Louis to San Juan Luis Munoz Marin Intl Airport flights:

• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Only Southwest operates flights between St. Louis and San Juan Luis Munoz Marin Intl Airport.

Flights from St. Louis to San Juan Luis Munoz Marin Intl Airport usually depart from Lambert-St Louis (STL) and arrive at San Juan Luis Munoz Marin Intl (SJU).

Here are some options for this route, based on selected ticket types and cabin classes:

• Southwest: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Three cabin classes are available on flights from St. Louis to San Juan Luis Munoz Marin Intl Airport:

• Economy Class
• Premium Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $375 round-trip via Houston George Bush Intcntl (IAH), compared to $467 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Southwest. Other aircraft seen on the route include Boeing 737 MAX 8 variants.

One-stop flights from St. Louis to San Juan Luis Munoz Marin Intl Airport most commonly connect through:

• Orlando (MCO) - 53% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 18% of one-stop connections
• Charlotte Douglas (CLT) - 8% of one-stop connections
• Chicago O'Hare Intl (ORD) - 7% of one-stop connections

Orlando (MCO) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 31% on the St. Louis to San Juan Luis Munoz Marin Intl Airport route. Monday is the cheapest departure day at $373 round-trip on average, while Friday is the most expensive at $534, a difference of $161. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the St. Louis to San Juan Luis Munoz Marin Intl Airport route, 30% of flights were delayed in the past 3 months, with delays averaging 1 hour 33 minutes.

Some of the most popular sights in San Juan Luis Munoz Marin Intl Airport are Viejo San Juan, Condado Beach and Puerto Rico Convention Center. These are among the most viewed places in San Juan Luis Munoz Marin Intl Airport on KAYAK.

A nonstop flight from St. Louis to San Juan Luis Munoz Marin Intl Airport takes 4h 20m, covering 2,024 miles.

These are the earliest and latest flight times available from St. Louis to San Juan Luis Munoz Marin Intl Airport:

• Earliest: departs at 10:55 am and lands at 3:15 pm
• Latest: departs at 10:55 am and lands at 3:15 pm.

The flight takes about 4h 20m.

Last-minute fares on this route - booked within 2 weeks of departure - run 34% above the route average of $440. Book 12 weeks before departure for the lowest fares.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $244 to $1,721. That means the highest observed fare was about 7x higher than the lowest one.

One-way fares from St. Louis to San Juan Luis Munoz Marin Intl Airport are currently lower than usual. Average one-way flight prices are about $148, which is 43% below the typical average for this route.

Southwest is the only airline operating St. Louis to San Juan Luis Munoz Marin Intl Airport flights. 70% of its flights are on time.

Morning flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

Flying via Atlanta Hartsfield-Jackson (ATL) gives the shortest average 1-stop total travel time at 7h 11m, compared with 7h 16m via Tampa (TPA) and 7h 24m via Baltimore/Washington (BWI).

San Juan Luis Munoz Marin Intl Airport is 1 hour ahead of St. Louis (Atlantic Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

San Juan Luis Munoz Marin Intl Airport (SJU) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:
· Routes Car & Truck Rentals
· U-Save
· Payless
· Hertz
· Europcar

Round-trip flights from St. Louis to San Juan Luis Munoz Marin Intl Airport range from $334 to $599, with an average of $440 over the past 12 months. Anything below $334 counts as a good deal.