$106+ 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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — STL
Nov 27 — Dec 41
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 65 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
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 October 28, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $225 (Delta) |
One-way from | $106 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $422 |
Find 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 October 28, 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 October 28, 2025.
This Delta deal was found by Cheapflights users on 10/27. 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.
Thu 12/46:38 pmSJU - STL
1 stop7h 04mDelta
Mon 12/86:00 amSTL - SJU
1 stop6h 14mDelta
Deal found 10/27![Delta logo]()
$225
This Southwest deal was found by Cheapflights users on 10/28. 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.
Thu 12/49:40 amSJU - STL
1 stop11h 50mSouthwest
Mon 12/88:15 amSTL - SJU
1 stop11h 15mSouthwest
Deal found 10/28![Southwest logo]()
$264
This Frontier deal was found by Cheapflights users on 10/28. 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.
Thu 11/206:01 amSJU - STL
2 stops19h 56mFrontier
Mon 11/244:13 pmSTL - SJU
1 stop8h 41mFrontier
Deal found 10/28![Frontier logo]()
$272
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/215:19 pmSJU - STL
1 stop17h 38mMultiple Airlines
Mon 11/247:04 pmSTL - SJU
2 stops26h 40mMultiple Airlines
Deal found 10/28![Multiple Airlines logo]()
$277
This Frontier deal was found by Cheapflights users on 10/26. 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.
Thu 11/133:59 amSJU - STL
1 stop8h 21mFrontier
Mon 11/172:12 pmSTL - SJU
1 stop10h 42mFrontier
Deal found 10/26![Frontier logo]()
$291
This Frontier deal was found by Cheapflights users on 10/27. 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.
Thu 11/133:59 amSJU - STL
1 stop8h 21mFrontier
Sun 11/162:12 pmSTL - SJU
1 stop10h 42mFrontier
Deal found 10/27![Frontier logo]()
$296
This American Airlines deal was found by Cheapflights users on 10/26. 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.
Thu 12/183:58 pmSJU - STL
1 stop9h 47mAmerican Airlines
Thu 1/15:30 amSTL - SJU
1 stop16h 29mAmerican Airlines
Deal found 10/26![American Airlines logo]()
$298
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 12/46:42 pmSJU - STL
1 stop7h 17mAmerican Airlines
Mon 12/82:04 pmSTL - SJU
1 stop6h 05mAmerican Airlines
Deal found 10/28![American Airlines logo]()
$302
This Southwest deal was found by Cheapflights users on 10/26. 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 12/58:55 amSJU - STL
2 stops9h 25mSouthwest
Mon 12/87:35 pmSTL - SJU
1 stop12h 50mSouthwest
Deal found 10/26![Southwest logo]()
$303
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 October 28, 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
Thu 12/4
2:36 pm-9:28 pm
2 stops8h 52m
Lambert-St Louis
Sun 12/7
5:02 am-10:05 pm
1 stop15h 03m
$225
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 12/5
7:00 am-4:06 pm
1 stop11h 06m
Lambert-St Louis
Mon 12/8
1:57 pm-11:20 pm
1 stop7h 23m
$264
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 12/4
6:38 pm-11:42 pm
1 stop7h 04m
Lambert-St Louis
Mon 12/8
1:57 pm-11:20 pm
1 stop7h 23m
$264
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 11/21
5:19 pm-8:57 am
1 stop17h 38m
Lambert-St Louis
Mon 11/24
4:13 pm-2:54 am
1 stop8h 41m
$279
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 2/19
5:41 am-10:29 am
1 stop6h 48m
Lambert-St Louis
Mon 2/23
6:32 pm-3:35 pm
2 stops19h 03m
$285
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 11/13
3:59 am-10:20 am
1 stop8h 21m
Lambert-St Louis
Mon 11/17
2:12 pm-2:54 am
1 stop10h 42m
$291
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 11/20
6:01 am-11:57 pm
2 stops19h 56m
Lambert-St Louis
Mon 11/24
7:43 pm-12:07 pm
2 stops14h 24m
$296
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 12/5
8:55 am-4:20 pm
2 stops9h 25m
Lambert-St Louis
Mon 12/8
7:35 pm-10:25 am
1 stop12h 50m
$303
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 12/4
11:00 am-11:59 pm
1 stop14h 59m
Lambert-St Louis
Mon 12/8
6:00 am-5:03 pm
2 stops9h 03m
$305
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 2/19
7:45 am-3:38 pm
1 stop9h 53m
Lambert-St Louis
Mon 2/23
9:55 am-10:22 pm
2 stops10h 27m
$315
Showing 1-10 of 22 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 October.
| 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 October 24, 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 65 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, January is the cheapest month in which you can book a flight from San Juan Luis Munoz Marin Intl Airport to St. Louis (average of $128). 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 October 28, 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 October 28, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United 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.
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
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
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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 5 airlines flying from Luis Munoz Marin Intl to St. Louis
Discover the top 5 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 October 28, 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$248 | Average$462 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$254 | Average$414 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$610 | FlexibilityNo cancel fee | On-time63% |