$58+ Cheap flights from Luis Munoz Marin Intl (SJU) to St. Louis (STL)
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 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — STL
ene. 12 — ene. 191
1 adult, Economy
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Find cheap flights from Luis Munoz Marin Intl to St. Louis 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from San Juan Luis Munoz Marin Intl to Lambert-St Louis are usually found in January or September, booked 59 days in advance, depart on a Tuesday or Thursday and return on a Wednesday
Cheap flight deals from Luis Munoz Marin Intl to St. Louis
Cheapest flights from Luis Munoz Marin Intl to St. LouisExplore the most affordable flight options available from Luis Munoz Marin Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 13, 2025.
Explore the most affordable flight options available from Luis Munoz Marin Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 13, 2025.
This Priceline deal was found by Cheapflights users on 12/12. 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.
sáb. 12/205:09 pmSJU - STL
1 stop7h 24mFrontier
lun. 12/294:27 pmSTL - SJU
1 stop8h 23mFrontier
Deal found 12/12![Frontier logo]()
$243
This Priceline deal was found by Cheapflights users on 12/11. 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.
vie. 12/263:55 amSJU - STL
1 stop20h 38mFrontier
mié. 12/314:27 pmSTL - SJU
1 stop8h 23mFrontier
Deal found 12/11![Frontier logo]()
$349
This Cheapflightsfares deal was found by Cheapflights users on 12/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/294:10 amSJU - STL
1 stop8h 46mSpirit Airlines
mar. 1/611:51 amSTL - SJU
1 stop8h 14mSpirit Airlines
Deal found 12/12![Spirit Airlines logo]()
$381
This Kiwi.com deal was found by Cheapflights users on 12/12. 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.
sáb. 12/204:02 pmSJU - STL
1 stop19h 38mMultiple Airlines
lun. 12/294:27 pmSTL - SJU
2 stops41h 31mMultiple Airlines
Deal found 12/12![Multiple Airlines logo]()
$422
This Priceline deal was found by Cheapflights users on 12/11. 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.
dom. 12/143:55 amSJU - STL
1 stop20h 38mFrontier
sáb. 12/204:27 pmSTL - SJU
1 stop8h 23mFrontier
Deal found 12/11![Frontier logo]()
$423
This Kiwi.com deal was found by Cheapflights users on 12/11. 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.
jue. 12/256:00 amSJU - STL
1 stop18h 33mMultiple Airlines
lun. 12/2910:40 amSTL - SJU
2 stops23h 49mMultiple Airlines
Deal found 12/11![Multiple Airlines logo]()
$469
This Kiwi.com deal was found by Cheapflights users on 12/11. 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.
sáb. 12/276:28 pmSJU - STL
1 stop18h 28mMultiple Airlines
mié. 12/317:43 pmSTL - SJU
2 stops27h 41mMultiple Airlines
Deal found 12/11![Multiple Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 12/12. 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.
mar. 12/308:10 amSJU - STL
1 stop8h 16mUnited Airlines
mar. 1/68:05 amSTL - SJU
2 stops14h 31mUnited Airlines
Deal found 12/12![United Airlines logo]()
$574
This American Airlines deal was found by Cheapflights users on 12/11. 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.
sáb. 12/2010:25 amSJU - STL
2 stops11h 05mAmerican Airlines
lun. 12/298:01 pmSTL - SJU
1 stop6h 59mAmerican Airlines
Deal found 12/11![American Airlines logo]()
$575
Find flight deals from Luis Munoz Marin Intl to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Luis Munoz Marin Intl (SJU) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated diciembre 13, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $148 (Frontier) |
One-way from | $58 (Frontier) |
Popular in | July |
Cheapest in | January |
Average price | $434 |
Cheapflights Fare Finder
Customize your flight search to find flights from Luis Munoz Marin Intl to St. Louis 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 diciembre 13, 2025.
Use the filters below to find and compare flights from San Juan Luis Munoz Marin Intl Airport to St. Louis that are best for you.
Fly from
Luis Munoz Marin Intl
Fly to
St. Louis
Route
Depart
Return
Price
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
jue. 1/15
9:04 pm-7:54 am
1 stop12h 50m
Lambert-St Louis
lun. 1/19
12:47 pm-2:30 am
1 stop11h 43m
$148
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
lun. 2/2
8:00 am-11:33 pm
1 stop17h 33m
Lambert-St Louis
vie. 2/6
5:42 pm-3:26 pm
1 stop19h 44m
$215
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
jue. 2/12
4:30 pm-11:23 pm
1 stop8h 53m
Lambert-St Louis
lun. 2/16
3:47 pm-11:58 pm
1 stop6h 11m
$225
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
jue. 1/15
1:24 pm-11:12 pm
2 stops11h 48m
Lambert-St Louis
lun. 1/19
6:00 am-5:03 pm
2 stops9h 03m
$230
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
sáb. 12/20
5:09 pm-10:33 pm
1 stop7h 24m
Lambert-St Louis
lun. 12/29
4:27 pm-2:50 am
1 stop8h 23m
$243
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
lun. 2/2
8:05 pm-11:33 pm
1 stop29h 28m
Lambert-St Louis
vie. 2/6
8:22 pm-6:58 pm
2 stops20h 36m
$269
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
jue. 2/26
7:09 pm-8:43 pm
1 stop27h 34m
$64
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
jue. 2/5
6:00 am-10:23 am
1 stop30h 23m
$75
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
mié. 2/4
4:36 pm-11:33 pm
1 stop8h 57m
$90
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
lun. 2/2
8:00 am-11:33 pm
1 stop17h 33m
$90
Showing 1-10 of 16 results
Compare providers for flights from Luis Munoz Marin Intl to St. Louis
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Luis Munoz Marin Intl to St. Louis in December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Juan Luis Munoz Marin Intl Airport-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Juan Luis Munoz Marin Intl Airport-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Juan Luis Munoz Marin Intl Airport-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Juan Luis Munoz Marin Intl Airport-St. Louis flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Juan Luis Munoz Marin Intl Airport-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Luis Munoz Marin Intl to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Luis Munoz Marin Intl with our price prediction graph.
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 San Juan Luis Munoz Marin Intl Airport to St. Louis
How far ahead should I book a flight from San Juan Luis Munoz Marin Intl Airport to St. Louis?
Use this chart to determine the optimal time to book a round-trip flight from Luis Munoz Marin Intl to St. Louis. Price data was last updated on December 5, 2025.
The price you pay for your flight from San Juan Luis Munoz Marin Intl Airport to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 58 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from San Juan Luis Munoz Marin Intl Airport to St. Louis?
Currently, June is the cheapest month in which you can book a flight from San Juan Luis Munoz Marin Intl Airport to St. Louis (average of $125). Flying from San Juan Luis Munoz Marin Intl Airport to St. Louis in August is currently the most expensive (average of $253). 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 SJU to STL?
Find hourly flight availability from Luis Munoz Marin Intl to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 13, 2025.
One of the essential ways to save on airfare from San Juan Luis Munoz Marin Intl Airport to St. Louis is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 54% on airfare.
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated diciembre 13, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and American Airlines from San Juan Luis Munoz Marin Intl Airport to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
7.9
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
7.9
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
7.9
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
7.9
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Luis Munoz Marin Intl to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus
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Alternative routes for Luis Munoz Marin Intl to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.
Top 4 airlines flying from Luis Munoz Marin Intl to St. Louis
Discover the top 4 airlines that operate flights from Luis Munoz Marin Intl to St. Louis. 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 diciembre 13, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$128 | Average$261 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$205 | Average$375 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$254 | Average$417 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$610 | FlexibilityNo cancel fee | On-time63% |