$117+ 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SJU
Sep 7 — Sep 141
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Puerto Rico with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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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
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Best
Last-minute
One-way
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 August 8, 2026.
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 August 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:29 pm -
2 stops25h 16m
Mon 9/286:30 am -
1 stop7h 40m
Deal found 8/2![Frontier logo]()
$272
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
1 stop22h 11m
Wed 11/46:12 pm -
2 stops17h 28m
Deal found 8/6![Frontier logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:29 pm -
2 stops25h 16m
Sun 9/275:11 pm -
1 stop20h 59m
Deal found 8/7![Frontier logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1910:35 am -
2 stops12h 03m
Thu 10/223:51 pm -
1 stop18h 49m
Deal found 8/4![Frontier logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:29 pm -
2 stops10h 44m
Sun 10/113:51 pm -
1 stop18h 49m
Deal found 8/6![Frontier logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:29 pm -
2 stops10h 44m
Mon 9/286:30 am -
1 stop7h 40m
Deal found 8/6![Frontier logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:29 pm -
2 stops25h 16m
Wed 9/306:42 pm -
1 stop24h 12m
Deal found 8/2![Frontier logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2910:35 am -
2 stops12h 22m
Sat 11/77:42 pm -
1 stop25h 57m
Deal found 8/3![Frontier logo]()
$287
Best flights from St. Louis to Puerto RicoDiscover carefully curated flight deals from St. Louis to Puerto Rico that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 8, 2026.
Discover carefully curated flight deals from St. Louis to Puerto Rico that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/138:34 pm -
1 stop15h 42m
Mon 11/165:30 pm -
1 stop18h 10m
Deal found 8/7![Frontier logo]()
$343
This Delta deal was found by Cheapflights users on 8/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:00 am -
1 stop9h 49m
Tue 9/297:00 am -
1 stop7h 23m
Deal found 8/2![Delta logo]()
$356
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/234:20 pm -
2 stops8h 00m
Mon 11/25:35 am -
2 stops10h 30m
Deal found 8/4![Southwest logo]()
$356
This United Airlines deal was found by Cheapflights users on 8/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/128:30 am -
2 stops14h 20m
Wed 9/164:20 pm -
1 stop8h 18m
Deal found 8/2![United Airlines logo]()
$446
This American Airlines deal was found by Cheapflights users on 8/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:54 am -
2 stops10h 39m
Tue 8/251:38 pm -
2 stops10h 17m
Deal found 8/2![American Airlines logo]()
$456
This Delta deal was found by Cheapflights users on 8/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/222:30 pm -
1 stop6h 49m
Wed 9/307:00 am -
1 stop7h 23m
Deal found 8/2![Delta logo]()
$356
This United Airlines deal was found by Cheapflights users on 8/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/248:33 am -
2 stops11h 49m
Mon 2/12:05 am -
2 stops15h 36m
Deal found 8/7![United Airlines logo]()
$446
This Southwest deal was found by Cheapflights users on 8/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/131:20 pm -
2 stops9h 35m
Mon 11/166:40 am -
2 stops14h 45m
Deal found 8/7![Southwest logo]()
$461
This Delta deal was found by Cheapflights users on 8/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/206:00 am -
1 stop9h 20m
Sun 1/246:15 am -
1 stop10h 28m
Deal found 8/5![Delta logo]()
$456
This Southwest deal was found by Cheapflights users on 8/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/285:05 am -
1 stop9h 30m
Sat 12/510:55 am -
Nonstop5h 00m
Deal found 8/5![Southwest logo]()
$482
Last-minute flights from St. Louis to Puerto RicoDiscover last-minute flight deals from St. Louis to Puerto Rico. Data last updated August 8, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Puerto Rico. Data last updated August 8, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:02 pm -
1 stop14h 09m
Wed 8/265:37 pm -
2 stops24h 45m
Deal found 8/2![Frontier logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:17 pm -
2 stops29h 39m
Fri 9/116:30 am -
1 stop7h 40m
Deal found 8/5![Frontier logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:29 pm -
2 stops25h 16m
Mon 9/286:30 am -
1 stop7h 40m
Deal found 8/2![Frontier logo]()
$272
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:29 pm -
2 stops25h 16m
Sun 9/275:11 pm -
1 stop20h 59m
Deal found 8/7![Frontier logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:29 pm -
2 stops25h 16m
Wed 9/306:42 pm -
1 stop24h 12m
Deal found 8/2![Frontier logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:29 pm -
1 stop22h 11m
Tue 9/298:45 am -
2 stops29h 25m
Deal found 8/2![Frontier logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:29 pm -
2 stops10h 44m
Mon 9/286:30 am -
1 stop7h 40m
Deal found 8/6![Frontier logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:29 pm -
2 stops19h 24m
Sat 10/103:51 pm -
1 stop18h 49m
Deal found 8/6![Frontier logo]()
$297
One-way flights from St. Louis to Puerto RicoSearch for one-way flight options from St. Louis to Puerto Rico. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
Search for one-way flight options from St. Louis to Puerto Rico. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
2 stops23h 48m
Deal found 8/6![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/910:35 am -
2 stops36h 03m
Deal found 8/7![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/76:17 pm -
2 stops30h 50m
Deal found 8/7![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/110:35 am -
2 stops36h 03m
Deal found 8/3![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:17 pm -
2 stops29h 39m
Deal found 8/5![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:29 pm -
2 stops25h 21m
Deal found 8/6![Frontier logo]()
$132
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 August 8, 2026.
Round-trip from | $273 (Kiwi.com) |
|---|---|
One-way from | $117 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $409 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Puerto Rico that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 8, 2026.
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
Cheapest round-trip
St. LouisSan Juan
STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl
STLSJU
Lambert-St Louis
Fri 11/13
8:34 pm-2:16 pm
1 stop15h 42m
San Juan Luis Munoz Marin Intl
Mon 11/16
5:30 pm-9:40 am
1 stop18h 10m
$343
St. LouisSan Juan
STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl
STLSJU
Lambert-St Louis
Mon 9/21
6:00 am-4:49 pm
1 stop9h 49m
San Juan Luis Munoz Marin Intl
Tue 9/29
7:00 am-1:23 pm
1 stop7h 23m
$356
St. LouisSan Juan
STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl
STLSJU
Lambert-St Louis
Fri 10/23
4:20 pm-1:20 am
2 stops8h 00m
San Juan Luis Munoz Marin Intl
Mon 11/2
5:35 am-2:05 pm
2 stops10h 30m
$356
Quickest round-trip
St. LouisSan Juan
STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl
STLSJU
Lambert-St Louis
Tue 9/22
2:30 pm-10:19 pm
1 stop6h 49m
San Juan Luis Munoz Marin Intl
Wed 9/30
7:00 am-1:23 pm
1 stop7h 23m
$356
St. LouisSan Juan
STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl
STLSJU
Lambert-St Louis
Sat 9/12
8:30 am-11:50 pm
2 stops14h 20m
San Juan Luis Munoz Marin Intl
Wed 9/16
4:20 pm-11:38 pm
1 stop8h 18m
$446
St. LouisSan Juan
STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl
STLSJU
Lambert-St Louis
Sun 1/24
8:33 am-10:22 pm
2 stops11h 49m
San Juan Luis Munoz Marin Intl
Mon 2/1
2:05 am-3:41 pm
2 stops15h 36m
$446
St. LouisSan Juan
STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl
STLSJU
Lambert-St Louis
Tue 8/18
6:54 am-6:33 pm
2 stops10h 39m
San Juan Luis Munoz Marin Intl
Tue 8/25
1:38 pm-10:55 pm
2 stops10h 17m
$456
St. LouisSan Juan
STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl
STLSJU
Lambert-St Louis
Wed 1/20
6:00 am-5:20 pm
1 stop9h 20m
San Juan Luis Munoz Marin Intl
Sun 1/24
6:15 am-2:43 pm
1 stop10h 28m
$456
St. LouisSan Juan
STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl
STLSJU
Lambert-St Louis
Fri 11/13
1:20 pm-12:55 am
2 stops9h 35m
San Juan Luis Munoz Marin Intl
Mon 11/16
6:40 am-7:25 pm
2 stops14h 45m
$461
St. LouisSan Juan
STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl
STLSJU
Lambert-St Louis
Sat 11/28
5:05 am-4:35 pm
1 stop9h 30m
San Juan Luis Munoz Marin Intl
Sat 12/5
10:55 am-1:55 pm
Nonstop5h 00m
$482
Showing 1-10 of 21 resultsSorted by cheapest first
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.
STL-SJU
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Puerto Rico
STL-PR0
STL-SJU
What is the cheapest month to book a flight from St. Louis to Puerto Rico?
Currently, October is the cheapest month in which you can book a flight from St. Louis to Puerto Rico (average of $325). Flying from St. Louis to Puerto Rico in December is currently the most expensive (average of $596). 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 August 8, 2026.
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.
How often are flights from St. Louis to Puerto Rico delayed?
About 30% of weekly flights between St. Louis and Puerto Rico have experienced delays in the past year, with the average delay time being 93 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 Saturday 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 30% of flights being delayed.
How far ahead should I book a flight from St. Louis to Puerto Rico?
The price you pay for your flight from St. Louis to Puerto Rico may vary depending on when you book. For the best chance of a lower fare, look to book 53 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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 August 8, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited 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.
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
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
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Complete your trip
Complete your trip to Puerto Rico by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Puerto Rico by cabin class
Find flights from St. Louis to Puerto Rico, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Puerto Rico flights
Browse other St. Louis and Puerto Rico flight options. Last updated on August 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from St. Louis to Puerto Rico
Discover the top 5 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 August 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$148 | Average$342 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$205 | Average$416 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$225 | Average$406 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$250 | Average$495 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$296 | Average$483 | FlexibilityNo cancel fee | On-time63% |