Cheap flights from St. Louis (STL) to Puerto Rico from $91
This is the cheapest one-way flight price, found on 9/20. Prices may vary by date and flight preferences.
How far in advance should I book a flight from St. Louis to Puerto Rico?
To save on the cost of your flight from St. Louis to Puerto Rico, book at least 25 days before your planned departure. Booking around this time can save you about 30% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $432 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $567.
What is the cheapest month to fly from St. Louis to Puerto Rico?
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, September can be a great choice for travel to Puerto Rico. Flights to Puerto Rico from St. Louis in September are about $422 on average during September, but can be found for as low as $188.
When is the cheapest time to fly from St. Louis to Puerto Rico (STL - PR)?
When flying from St. Louis to Puerto Rico, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Cheap Spirit Airlines flights from St. Louis to Puerto Rico
Peruse some of the lowest-priced Spirit Airlines flights we've found from St. Louis to Puerto Rico. Make sure to check back often as deals are often changing.
Cheap United Airlines flights from St. Louis to Puerto Rico
Some of the best deals we've found on United Airlines flights traveling from St. Louis to Puerto Rico. Make sure to examine the flight information before completing your reservation.
Cheap St. Louis to Puerto Rico flights in September & October 2023
The best prices found for STL to Puerto Rico flights for September, October
Scroll through some of the best deals on flights from St. Louis to Puerto Rico in 2023. Check back regularly for other flight deals.
St. Louis to Puerto Rico 2023 flight deals
Cheap flights to Puerto Rico from St. Louis found for this year
Scroll through some of the best deals on flights from St. Louis to Puerto Rico in 2023. Check back regularly for other flight deals.
St. Louis to Puerto Rico flights leaving soon
Late deals on return flights to Puerto Rico from St. Louis, departing today and this week
Consider one of these great deals we found on last-minute flights from St. Louis to Puerto Rico. Users should be sure to double check the price, date, and time of their last-minute flight.
One-way flights to Puerto Rico from St. Louis
The cheapest one-way flights from St. Louis to Puerto Rico
If you're seeking multiple options on one-way flights from St. Louis to Puerto Rico, be sure to check out these deals, which are updated often. Users in need of a round-trip flight from St. Louis to Puerto Rico instead should update the search form at the top of page.
Find flights from St. Louis to Puerto Rico within your budget
Use the slider to find flights from St. Louis to Puerto Rico that fit your budget.
Fly from
Fly to
Budget
$186 - $402
Route
Depart
Return
Price
Lambert-St LouisSan Juan Luis Munoz Marin Intl
STL - SJU
STLSJU
Lambert-St Louis
Wed 10/4
1 stop10h 48m
San Juan Luis Munoz Marin Intl
Sun 10/8
1 stop26h 35m
Lambert-St LouisSan Juan Luis Munoz Marin Intl
STL - SJU
STLSJU
Lambert-St Louis
Tue 10/3
1 stop6h 36m
San Juan Luis Munoz Marin Intl
Tue 10/10
2 stops37h 12m
Lambert-St LouisSan Juan Luis Munoz Marin Intl
STL - SJU
STLSJU
Lambert-St Louis
Wed 10/18
1 stop8h 52m
San Juan Luis Munoz Marin Intl
Wed 10/25
2 stops23h 56m
Lambert-St LouisSan Juan Luis Munoz Marin Intl
STL - SJU
STLSJU
Lambert-St Louis
Wed 10/18
2 stops18h 09m
San Juan Luis Munoz Marin Intl
Wed 10/25
2 stops23h 56m
Lambert-St LouisSan Juan Luis Munoz Marin Intl
STL - SJU
STLSJU
Lambert-St Louis
Sat 11/4
2 stops26h 41m
San Juan Luis Munoz Marin Intl
Wed 11/8
2 stops24h 03m
Lambert-St LouisSan Juan Luis Munoz Marin Intl
STL - SJU
STLSJU
Lambert-St Louis
Thu 1/18
1 stop24h 34m
San Juan Luis Munoz Marin Intl
Tue 1/23
1 stop11h 42m
Lambert-St LouisSan Juan Luis Munoz Marin Intl
STL - SJU
STLSJU
Lambert-St Louis
Sat 11/4
1 stop10h 08m
San Juan Luis Munoz Marin Intl
Tue 11/7
1 stop20h 12m
Lambert-St LouisSan Juan Luis Munoz Marin Intl
STL - SJU
STLSJU
Lambert-St Louis
Sun 10/22
1 stop16h 51m
San Juan Luis Munoz Marin Intl
Thu 10/26
1 stop9h 20m
Lambert-St LouisSan Juan Luis Munoz Marin Intl
STL - SJU
STLSJU
Lambert-St Louis
Fri 1/26
1 stop10h 12m
San Juan Luis Munoz Marin Intl
Thu 2/1
2 stops15h 23m
Reviews of airlines servicing Puerto Rico
Read through reviews of airlines operating flights from St. Louis to Puerto Rico, such as Spirit Airlines, United Airlines and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
Crew
Entertainment
Boarding
Food
Overall
Reviews
The flight was not listed on the screens so we had to guess which gate to go to from another similar flight and got lucky. Flight crew seemed irritated to be there.
Comfort
Crew
Entertainment
Boarding
Food
Overall
Reviews
The flight was not listed on the screens so we had to guess which gate to go to from another similar flight and got lucky. Flight crew seemed irritated to be there.
Comfort
Crew
Entertainment
Boarding
Food
Overall
Reviews
The flight was not listed on the screens so we had to guess which gate to go to from another similar flight and got lucky. Flight crew seemed irritated to be there.
Comfort
Crew
Entertainment
Boarding
Food
Overall
Reviews
The flight was not listed on the screens so we had to guess which gate to go to from another similar flight and got lucky. Flight crew seemed irritated to be there.
Comfort
Crew
Entertainment
Boarding
Food
Overall
Reviews
The flight was not listed on the screens so we had to guess which gate to go to from another similar flight and got lucky. Flight crew seemed irritated to be there.
Comfort
Crew
Entertainment
Boarding
Food
Overall
Reviews
The flight was not listed on the screens so we had to guess which gate to go to from another similar flight and got lucky. Flight crew seemed irritated to be there.
Related info for your journey
Useful info, stats and facts about St. Louis to Puerto Rico flights.
What airport do you fly from for flights from St. Louis to Puerto Rico?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Puerto Rico. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.
Can I find flights from St. Louis to Puerto Rico for under $200 on Cheapflights?
Yes, there are multiple flights from St. Louis to Puerto Rico for under $200. The cheapest flight booked recently is on Multiple Airlines for just $186, but on average you can expect to pay $223.
Are there last-minute flights available from St. Louis to Puerto Rico for under $300?
There are currently 20+ open flights from St. Louis to Puerto Rico within the next 7 days for less than $300.
What are the cheapest airlines to fly from St. Louis to Puerto Rico one-way?
For one-way options, check prices for Frontier. According to our data, you can fly for as low as $104. Users have also found prices from $110 and $146 on Spirit Airlines and American Airlines, respectively.
What are the most popular airlines that fly from St. Louis to Puerto Rico?
Consider American Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from St. Louis to Puerto Rico.
What does STL to SJU mean?
STL stands for Lambert-St Louis Airport, while SJU stands for San Juan Luis Munoz Marin Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Aguadilla Borinquen Airport (BQN), San Juan Isla Grande Airport (SIG), Ponce Mercedita Airport (PSE), Vieques Airport (VQS), Culebra Airport (CPX) are some additional IATA codes for airports related to your trip.