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Cheap flights from San Juan to St. Louis (STL) from $99

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 5/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SJU — STL
Apr 21 — Apr 281
From?
To?
Sun 4/21
Sun 4/28
1 adult, Economy
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The best prices from San Juan to Lambert-St Louis are usually found in April or January, booked 36 days in advance, depart on a Friday or Wednesday and return on a Wednesday

Cheap flight deals from San Juan to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) 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 April 16, 2024.

Popular in

June

Cheapest in

April

Round-trip from

$323

One-way from

$243
High demand for flights, 21% potential price rise
Search Deals
Best time to find cheap flights, 33% potential price drop
Search Deals
From San Juan to Lambert-St Louis
Search Deals
One-way flight from San Juan to Lambert-St Louis
Search Deals

What is the cheapest day to fly round-trip from San Juan to St. Louis?

Users have found that leaving on a Thursday can be a cost-effective option. It’s possible to save up to 29% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from San Juan to St. Louis?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 37 days in advance, which can save you up to 51% on flights from San Juan to St. Louis compared to booking the week you need them. Waiting 37 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $174. For sooner than that we have options available in the next 3 days from $625.

What is the cheapest month to fly from San Juan to St. Louis?

April can be a great time to fly to St. Louis from San Juan with a flight ticket averaging about $404. Cheapflights users have found deals in the month of April for as cheap as $184. The most expensive prices can be found in the month of June.

When is the cheapest time to fly from San Juan to St. Louis (SJU - STL)?

One of the essential ways to save on airfare from San Juan 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 33% on airfare.

Cheap Frontier flights from San Juan to St. Louis

Explore cheap flight options specifically provided by Frontier for the route between San Juan and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
Find some of the cheapest Frontier flights traveling from San Juan to St. Louis. Come back soon if you're not finding the exact deal you're looking for.
Sat 4/2711:33 amSJU - STL
1 stop9h 59mFrontier
Sat 5/43:36 pmSTL - SJU
1 stop9h 14mFrontier
Deal found 4/15$186
Tue 9/106:46 pmSJU - STL
1 stop20h 56mFrontier
Thu 9/126:42 pmSTL - SJU
1 stop21h 05mFrontier
Deal found 4/15$234
Sat 6/2910:15 pmSJU - STL
1 stop9h 53mFrontier
Thu 8/16:42 pmSTL - SJU
1 stop17h 47mFrontier
Deal found 4/15$360
Thu 6/208:29 pmSJU - STL
1 stop11h 39mFrontier
Mon 6/246:16 pmSTL - SJU
1 stop13h 07mFrontier
Deal found 4/15$404
Fri 6/283:08 amSJU - STL
1 stop9h 05mFrontier
Thu 8/16:42 pmSTL - SJU
1 stop21h 05mFrontier
Deal found 4/15$568

Cheap Spirit Airlines flights from San Juan to St. Louis

Explore cheap flight options specifically provided by Spirit Airlines for the route between San Juan and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
To aid your search, here are some of the cheapest Spirit Airlines flights we've found from San Juan to St. Louis. Deals frequently update to provide users with more options.
Fri 4/262:40 amSJU - STL
1 stop9h 00mSpirit Airlines
Sat 5/411:39 amSTL - SJU
1 stop13h 05mSpirit Airlines
Deal found 4/15$203
Fri 5/32:40 amSJU - STL
1 stop9h 00mSpirit Airlines
Tue 5/710:34 amSTL - SJU
1 stop6h 33mSpirit Airlines
Deal found 4/14$217
Fri 5/32:40 amSJU - STL
1 stop9h 00mSpirit Airlines
Tue 5/710:34 amSTL - SJU
1 stop6h 33mSpirit Airlines
Deal found 4/15$222
Mon 9/93:38 amSJU - STL
1 stop10h 59mSpirit Airlines
Thu 9/127:48 pmSTL - SJU
1 stop6h 00mSpirit Airlines
Deal found 4/15$301
Fri 6/147:06 pmSJU - STL
1 stop23h 22mSpirit Airlines
Sun 6/165:50 pmSTL - SJU
1 stop16h 50mSpirit Airlines
Deal found 4/15$340
Wed 5/223:15 amSJU - STL
1 stop16h 25mSpirit Airlines
Tue 5/2810:34 amSTL - SJU
1 stop23h 58mSpirit Airlines
Deal found 4/15$346
Thu 9/53:38 amSJU - STL
1 stop19h 36mSpirit Airlines
Tue 9/102:35 pmSTL - SJU
1 stop8h 27mSpirit Airlines
Deal found 4/15$384

Cheap San Juan to St. Louis flights in April & May 2024

Find cheap flight options from San Juan to St. Louis specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,165,818 searches. Prices were last updated on April 16, 2024.
Scroll through some of the best deals on flights from San Juan to St. Louis in 2024. If these deals don't appeal to you, be sure to come back soon for more options.
Sat 4/2711:33 amSJU - STL
1 stop9h 59mFrontier
Sat 5/43:36 pmSTL - SJU
1 stop9h 14mFrontier
Deal found 4/15$186
Fri 4/262:40 amSJU - STL
1 stop9h 00mSpirit Airlines
Sat 5/411:39 amSTL - SJU
1 stop13h 05mSpirit Airlines
Deal found 4/15$203
Fri 5/32:40 amSJU - STL
1 stop9h 00mSpirit Airlines
Tue 5/710:34 amSTL - SJU
1 stop6h 33mSpirit Airlines
Deal found 4/14$217
Tue 4/167:43 pmSJU - STL
1 stop26h 10mFrontier
Fri 4/197:16 pmSTL - SJU
1 stop14h 32mFrontier
Deal found 4/15$323
Wed 5/223:15 amSJU - STL
1 stop16h 25mSpirit Airlines
Tue 5/2810:34 amSTL - SJU
1 stop23h 58mSpirit Airlines
Deal found 4/15$346
Tue 5/216:31 amSJU - STL
1 stop8h 06mMultiple Airlines
Fri 5/246:05 pmSTL - SJU
2 stops28h 54mMultiple Airlines
Deal found 4/14$402
Fri 4/196:25 amSJU - STL
2 stops14h 55mMultiple Airlines
Sun 4/217:30 pmSTL - SJU
1 stop5h 40mMultiple Airlines
Deal found 4/15$415
Fri 4/196:25 amSJU - STL
2 stops14h 55mMultiple Airlines
Sun 4/2112:00 pmSTL - SJU
2 stops28h 03mMultiple Airlines
Deal found 4/15$416
Tue 5/215:55 pmSJU - STL
1 stop16h 58mAmerican Airlines
Fri 5/245:55 amSTL - SJU
1 stop7h 08mAmerican Airlines
Deal found 4/14$430

San Juan to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between San Juan and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
Scroll through some of the best deals on flights from San Juan to St. Louis in 2024. If these deals don't appeal to you, be sure to come back soon for more options.
Sat 4/2711:33 amSJU - STL
1 stop9h 59mFrontier
Sat 5/43:36 pmSTL - SJU
1 stop9h 14mFrontier
Deal found 4/15$186
Fri 4/262:40 amSJU - STL
1 stop9h 00mSpirit Airlines
Sat 5/411:39 amSTL - SJU
1 stop13h 05mSpirit Airlines
Deal found 4/15$203
Fri 5/32:40 amSJU - STL
1 stop9h 00mSpirit Airlines
Tue 5/710:34 amSTL - SJU
1 stop6h 33mSpirit Airlines
Deal found 4/14$217
Tue 9/106:46 pmSJU - STL
1 stop20h 56mFrontier
Thu 9/126:42 pmSTL - SJU
1 stop21h 05mFrontier
Deal found 4/15$234
Fri 9/69:50 pmSJU - STL
1 stop13h 38mMultiple Airlines
Mon 9/99:20 pmSTL - SJU
1 stop12h 45mMultiple Airlines
Deal found 4/15$289
Mon 9/93:38 amSJU - STL
1 stop10h 59mSpirit Airlines
Thu 9/127:48 pmSTL - SJU
1 stop6h 00mSpirit Airlines
Deal found 4/15$301
Fri 9/62:09 pmSJU - STL
1 stop9h 51mAmerican Airlines
Tue 9/105:37 amSTL - SJU
1 stop8h 06mAmerican Airlines
Deal found 4/15$313
Tue 4/167:43 pmSJU - STL
1 stop26h 10mFrontier
Fri 4/197:16 pmSTL - SJU
1 stop14h 32mFrontier
Deal found 4/15$323
Tue 9/1012:03 pmSJU - STL
2 stops10h 04mAmerican Airlines
Thu 9/125:31 amSTL - SJU
1 stop9h 44mAmerican Airlines
Deal found 4/15$324

One-way flights to St. Louis from San Juan

Search for one-way flight options from San Juan to St. Louis. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
Take a look at some of the one-way flights we've detected from San Juan to St. Louis. Those needing a return flight from San Juan to St. Louis can use the search form above.
Mon 5/139:07 pmSJU - STL
1 stop13h 32mSpirit Airlines
Deal found 4/15$99
Wed 5/159:07 pmSJU - STL
2 stops22h 33mSpirit Airlines
Deal found 4/15$110
Mon 5/279:07 pmSJU - STL
1 stop13h 32mSpirit Airlines
Deal found 4/15$123
Wed 5/155:40 amSJU - STL
3 stops38h 00mSpirit Airlines
Deal found 4/15$128
Mon 5/2711:59 pmSJU - STL
2 stops10h 40mSpirit Airlines
Deal found 4/15$148
Tue 5/141:30 amSJU - STL
3 stops42h 10mMultiple Airlines
Deal found 4/15$155
Mon 5/139:07 pmSJU - STL
2 stops17h 30mMultiple Airlines
Deal found 4/15$156
Sun 5/1212:45 amSJU - STL
1 stop9h 17mAmerican Airlines
Deal found 4/15$157
Fri 6/148:06 pmSJU - STL
1 stop22h 22mSpirit Airlines
Deal found 4/14$164

Find flights from San Juan to St. Louis within your budget

Customize your flight search to find flights from San Juan 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 3,165,818 searches. Data last updated April 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$186 - $479

Route

Depart

Return

Price

San Juan Luis Munoz Marin IntlLambert-St Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Sat 4/27

1 stop9h 59m

Lambert-St Louis

Sat 5/4

1 stop9h 14m

$186

San Juan Luis Munoz Marin IntlLambert-St Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 4/26

1 stop9h 00m

Lambert-St Louis

Sat 5/4

1 stop13h 05m

$203

San Juan Luis Munoz Marin IntlLambert-St Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 5/3

1 stop9h 00m

Lambert-St Louis

Tue 5/7

1 stop6h 33m

$217

San Juan Luis Munoz Marin IntlLambert-St Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 5/3

1 stop9h 00m

Lambert-St Louis

Tue 5/7

1 stop6h 33m

$222

San Juan Luis Munoz Marin IntlLambert-St Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Tue 9/10

1 stop20h 56m

Lambert-St Louis

Thu 9/12

1 stop21h 05m

$234

San Juan Luis Munoz Marin IntlLambert-St Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 9/6

1 stop13h 38m

Lambert-St Louis

Mon 9/9

1 stop12h 45m

$289

San Juan Luis Munoz Marin IntlLambert-St Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 9/6

1 stop9h 51m

Lambert-St Louis

Tue 9/10

1 stop8h 06m

$313

San Juan Luis Munoz Marin IntlLambert-St Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 7/5

1 stop8h 27m

Lambert-St Louis

Thu 7/11

1 stop9h 13m

$434

San Juan Luis Munoz Marin IntlLambert-St Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 5/3

2 stops14h 18m

Lambert-St Louis

Tue 5/7

1 stop8h 28m

$479

Flights are sorted by cheapest first

Deals found on 4/15

When is the best time to book a flight from San Juan to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from San Juan to St. Louis. Price data was last updated on January 28, 2024.
Booking 36 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Juan to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

When is the cheapest time to fly from San Juan to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from San Juan to St. Louis. Price data was last updated on April 14, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their San Juan to St. Louis flight should consider departing on Tuesday evenings when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to St. Louis by month

Plan your trip from San Juan to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from San Juan to St. Louis is currently $138 while a round-trip flight costs $286. Price data was last updated on April 14, 2024.

Currently, October is the cheapest month in which you can book a flight from San Juan to St. Louis (average of $323). Flying from San Juan to St. Louis in July is currently the most expensive (average of $376). 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.

January

$326

February

$331

March

$357

April

$339

May

$352

June

$374

July

$376

August

$336

September

$324

October

$323

November

$336

December

$326

Temperature and rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature and rainfall totals by month.

STL

Temperature

32 - 80.6 °F

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 April 16, 2024.
Read through reviews of airlines operating flights from San Juan to St. Louis, such as Frontier, Spirit Airlines and American Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,054 reviews
Check prices

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,054 reviews
Alaska Airlines
8.1
Very good
9,054 reviews
Check prices

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.1
Very good
11,123 reviews
Alaska Airlines
8.1
Very good
9,054 reviews
Check prices

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
11,352 reviews
Alaska Airlines
8.1
Very good
9,054 reviews
Check prices

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
14,952 reviews
Alaska Airlines
8.1
Very good
9,054 reviews
Check prices

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Spirit Airlines
6.4
Okay
8,785 reviews
Alaska Airlines
8.1
Very good
9,054 reviews
Check prices

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Find useful and relevant information for your journey from San Juan to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from San Juan?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to St. Louis from San Juan. Booking flights from San Juan to Lambert-St Louis (STL) should be relatively easy as there are 0 daily inbound flights from San Juan from 5 different airlines.

  • Can I find flights from San Juan to St. Louis for under $200 on Cheapflights?

    Yes, there are multiple flights from San Juan to St. Louis for under $200. The cheapest flight booked recently is on Frontier for just $186, but on average you can expect to pay $324.

  • What are the cheapest airlines flying from San Juan to St. Louis round-trip?

    Our cheapest airline available from San Juan to St. Louis is Frontier. Our recent data shows that you can find tickets from as low as $186 on this airline. Additional options worth looking into are Spirit Airlines and American Airlines, starting at $203 and $313 round-trip. These flights start at 53% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from San Juan to St. Louis one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $99. Users have also found prices from $157 and $178 on American Airlines and Frontier, respectively.

  • What are the most popular airlines that fly from San Juan to St. Louis?

    American Airlines, Delta and Frontier are the most popular airlines when flying from San Juan to St. Louis.

  • What does SJU to STL mean?

    Great question - SJU to STL just means San Juan Luis Munoz Marin Intl Airport to Lambert-St Louis Airport. Now you’ll know what these unique codes when you look for flights! Ponce Mercedita Airport (PSE), San Juan Isla Grande Airport (SIG), Culebra Airport (CPX), Vieques Airport (VQS), Ceiba J. Aponte de la Torre Airport (NRR) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from San Juan to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from San Juan to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from San Juan to St. Louis that include hotel bookings?

    Yes. In addition to deals on San Juan to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Juan to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to see available direct flights.

  • Can I find deals for business class flights from San Juan to St. Louis?

    Yes. Cheapflights offers flight deals from San Juan to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from San Juan to St. Louis that allow pets onboard?

    Many airlines do offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from San Juan to St. Louis?

    Yes, you can often find last-minute deals on San Juan to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the San Juan to St. Louis flight deals updated?

    The San Juan to St. Louis flight deals you see on this page were last updated on 4/15.

See more FAQs

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Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.

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Top 5 airlines flying from San Juan to St. Louis

Discover the top 5 airlines that operate flights from San Juan 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 3,165,818 searches. Data last updated April 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$162Average$296FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$197Average$290FlexibilityNo cancel feeOn-time62%
Search Frontier flights
American AirlinesCheapest$268Average$492FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$289Average$461FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$321Average$515FlexibilityNo cancel feeOn-time69%
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Search flights from San Juan to St. Louis by cabin class

Find flights from San Juan to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Weekly flight availability from San Juan to St. Louis

Explore weekly flight availability from San Juan to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 16, 2024.
Sunday1daily flight
Monday0daily flights
Tuesday0daily flights
Wednesday0daily flights
Thursday0daily flights
Friday0daily flights
Saturday1daily flight

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Fly with Cheapflights

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How does Cheapflights help users find flights from San Juan to St. Louis?

Cheapflights makes it easy to find San Juan to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from San Juan to St. Louis?

Cheapflights helps you find that perfect flight to St. Louis from San Juan by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from San Juan to St. Louis with no change fees?

Need flexible booking options for your flight to St. Louis from San Juan? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from San Juan to St. Louis become cheaper?

Not ready to book yet? You can track prices for flights from San Juan to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.

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