$90+ Cheap flights from St. Louis (STL) to Puerto Rico
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Puerto Rico
Cheapest flights from St. Louis to Puerto RicoExplore the most affordable flight options available from St. Louis to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.
Explore the most affordable flight options available from St. Louis to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.
This Frontier deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This CheapOair deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Priceline deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Priceline deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Priceline deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This CheapOair deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Priceline deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Find flight deals from St. Louis to Puerto Rico
Keep the following information in mind while searching for St. Louis to Puerto Rico flight deals. Data was last updated December 4, 2025.
Round-trip from | $180 (Priceline) |
|---|---|
One-way from | $90 (Priceline) |
Popular in | December |
Cheapest in | September |
Average price | $615 |
Cheapflights Fare Finder
Use the filters below to find and compare flights from St. Louis to Puerto Rico that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Thu 2/19
5:11 pm-9:55 am
1 stop14h 44m
San Juan Luis Munoz Marin Intl
Sun 2/22
3:55 am-10:33 pm
1 stop20h 38m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Sun 1/18
10:06 am-11:29 pm
1 stop11h 23m
San Juan Luis Munoz Marin Intl
Sat 1/24
4:36 pm-11:33 pm
1 stop8h 57m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Sun 2/22
6:00 am-4:36 pm
1 stop8h 36m
San Juan Luis Munoz Marin Intl
Thu 2/26
2:05 am-12:25 pm
2 stops12h 20m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Fri 2/27
5:11 pm-2:50 am
1 stop7h 39m
San Juan Luis Munoz Marin Intl
Mon 3/2
11:05 am-10:33 pm
1 stop13h 28m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Wed 3/4
2:35 pm-11:10 pm
1 stop6h 35m
San Juan Luis Munoz Marin Intl
Sat 3/7
6:30 am-12:40 pm
1 stop8h 10m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Mon 1/26
11:20 am-12:36 am
2 stops11h 16m
San Juan Luis Munoz Marin Intl
Wed 1/28
2:05 am-10:41 am
1 stop10h 36m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Thu 2/26
2:05 pm-11:25 pm
1 stop7h 20m
San Juan Luis Munoz Marin Intl
Tue 3/10
5:15 am-3:30 pm
1 stop11h 15m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Tue 3/3
8:15 am-5:05 pm
1 stop6h 50m
San Juan Luis Munoz Marin Intl
Sun 3/8
9:50 pm-7:55 am
1 stop11h 05m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Mon 2/23
9:55 am-10:22 pm
2 stops10h 27m
San Juan Luis Munoz Marin Intl
Thu 2/26
2:05 am-12:25 pm
2 stops12h 20m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Mon 1/26
10:16 am-6:40 pm
1 stop6h 24m
Best time to book a flight from St. Louis to Puerto Rico
Have a flexible travel schedule? Discover the best time to fly to Puerto Rico from St. Louis with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Puerto Rico
What is the cheapest month to book a flight from St. Louis to Puerto Rico?
Currently, May is the cheapest month in which you can book a flight from St. Louis to Puerto Rico (average of $140). Flying from St. Louis to Puerto Rico in December is currently the most expensive (average of $260). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from STL to PR?
Find hourly flight availability from St. Louis to Puerto Rico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.
It’s optimal to fly from St. Louis to Puerto Rico in the evening. By choosing this option you can save up to 58% on the cost of your flight, compared to a flight in the afternoon.
What is the cheapest day to fly from St. Louis to Puerto Rico?
Use this chart to determine the cheapest time to fly round-trip from St. Louis to Puerto Rico. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their St. Louis to Puerto Rico flight should consider departing on Tuesday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from St. Louis to Puerto Rico delayed?
About 18% of weekly flights between St. Louis and Puerto Rico have experienced delays in the past year, with the average delay time being 85 minutes.
What is the most punctual flight time for St. Louis to Puerto Rico flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on St. Louis to Puerto Rico flights?
Over the last year, Southwest have had the lowest number of delays on this route, with just 15% of flights being delayed.
Reviews of airlines servicing Puerto Rico
Get insights into the airlines that provide service to Puerto Rico. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Puerto Rico. Reviews last updated December 4, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from St. Louis to Puerto Rico by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Puerto Rico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for St. Louis to Puerto Rico
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from St. Louis to Puerto Rico
Discover the top 6 airlines that operate flights from St. Louis to Puerto Rico. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$140 | Average$289 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$170 | Average$334 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$208 | Average$384 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$219 | Average$596 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$225 | Average$393 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$246 | Average$527 | FlexibilityNo cancel fee | On-time71% |