Which airline has the best punctuality record on St. Louis to San Juan flights?

Over the last year, Southwest have had the lowest number of delays on this route, with just 15% of flights being delayed.

What is the most punctual flight time for St. Louis to San Juan 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.

How often are flights from St. Louis to San Juan delayed?

About 17% of weekly flights between St. Louis and San Juan have experienced delays in the past year, with the average delay time being 85 minutes.

How long is the flight from St. Louis to San Juan Luis Munoz Marin Intl Airport?

Airlines like Frontier, American Airlines, and United Airlines fly from St. Louis to San Juan Luis Munoz Marin Intl Airport in about 7h 59m. The time it takes to get you to your destination can typically vary by up to 2h 26m. St. Louis and San Juan Luis Munoz Marin Intl Airport are separated by a distance of 2024 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines to fly from St. Louis to San Juan Luis Munoz Marin Intl Airport one-way?

$84 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $110 and $112, respectively.

In terms of precipitation, rainfall in San Juan Luis Munoz Marin Intl Airport ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan Luis Munoz Marin Intl Airport when rainfall is around 2.2 in.

If weather is an important factor for your trip to San Juan Luis Munoz Marin Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

What are the most popular airlines that fly from St. Louis to San Juan Luis Munoz Marin Intl Airport?

Consider American Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from St. Louis to San Juan Luis Munoz Marin Intl Airport.

Most accurate provider : When it comes to deals on St. Louis-San Juan Luis Munoz Marin Intl Airport flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on St. Louis-San Juan Luis Munoz Marin Intl Airport flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from St. Louis-San Juan Luis Munoz Marin Intl Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-San Juan Luis Munoz Marin Intl Airport flights, Cheapflights users trust CheapOair the most. CheapOair 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 St. Louis-San Juan Luis Munoz Marin Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from St. Louis to San Juan Luis Munoz Marin Intl?

Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to San Juan Luis Munoz Marin Intl. On average, Lambert-St Louis has 0 outbound flights to San Juan Luis Munoz Marin Intl per day from 6 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

Can I find deals for flights from St. Louis to Luis Munoz Marin Intl that include hotel bookings?

Yes. In addition to deals on St. Louis to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Luis Munoz Marin Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Luis Munoz Marin Intl.

Can I find deals for business class flights from St. Louis to Luis Munoz Marin Intl?

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

$58+ Flights from St. Louis to San Juan Luis Munoz Marin Intl Airport

Q: How much does it cost to fly round-trip from St. Louis to San Juan Luis Munoz Marin Intl Airport?

Airfare is below average for this route at the moment. St. Louis to San Juan Luis Munoz Marin Intl Airport flights typically cost between $400 and $792 in January. The cheapest round-trip price found within the last 3 days was $116 on Frontier (Jan 26-Jan 29).

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Find cheap flights from St. Louis to Luis Munoz Marin Intl 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 Lambert-St Louis to San Juan Luis Munoz Marin Intl are usually found in September or April, booked 75 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from St. Louis to Luis Munoz Marin Intl

Cheapest flights from St. Louis to Luis Munoz Marin Intl
Explore the most affordable flight options available from St. Louis to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

lun. 12/153:30 pmSTL - SJU

1 stop9h 20mFrontier

dom. 12/213:55 amSJU - STL

1 stop7h 50mFrontier

Deal found 12/10

$243

mar. 12/163:30 pmSTL - SJU

1 stop9h 20mFrontier

jue. 1/159:04 pmSJU - STL

1 stop12h 50mFrontier

Deal found 12/10

$252

dom. 12/143:30 pmSTL - SJU

1 stop9h 20mFrontier

dom. 12/213:55 amSJU - STL

1 stop7h 50mFrontier

Deal found 12/11

$259

mié. 12/173:30 pmSTL - SJU

1 stop15h 53mFrontier

jue. 12/189:37 pmSJU - STL

1 stop26h 56mFrontier

Deal found 12/10

$264

lun. 12/153:30 pmSTL - SJU

1 stop9h 20mFrontier

dom. 12/214:09 pmSJU - STL

1 stop8h 24mFrontier

Deal found 12/10

$268

dom. 12/143:30 pmSTL - SJU

1 stop9h 20mFrontier

dom. 12/2110:33 pmSJU - STL

1 stop11h 39mFrontier

Deal found 12/11

$284

mar. 12/163:30 pmSTL - SJU

1 stop9h 20mFrontier

dom. 12/214:09 pmSJU - STL

1 stop8h 24mFrontier

Deal found 12/10

$289

vie. 12/123:30 pmSTL - SJU

1 stop9h 20mFrontier

dom. 12/2110:33 pmSJU - STL

1 stop11h 39mFrontier

Deal found 12/11

$299

Best flights from St. Louis to Luis Munoz Marin Intl
Discover carefully curated flight deals from St. Louis to Luis Munoz Marin Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated diciembre 12, 2025.

vie. 3/66:00 amSTL - SJU

1 stop7h 59mFrontier

lun. 3/94:09 pmSJU - STL

1 stop7h 24mFrontier

Deal found 12/11

$215

mié. 1/219:54 amSTL - SJU

2 stops8h 56mAmerican Airlines

mar. 1/276:00 amSJU - STL

2 stops11h 04mAmerican Airlines

Deal found 12/10

$225

lun. 1/269:57 amSTL - SJU

2 stops10h 25mUnited Airlines

mié. 1/282:15 pmSJU - STL

2 stops10h 43mUnited Airlines

Deal found 12/11

$225

vie. 2/611:18 amSTL - SJU

1 stop10h 41mFrontier

lun. 2/94:36 pmSJU - STL

1 stop8h 57mFrontier

Deal found 12/10

$215

mié. 1/219:54 amSTL - SJU

2 stops8h 56mAmerican Airlines

lun. 1/267:12 pmSJU - STL

1 stop15h 56mAmerican Airlines

Deal found 12/11

$225

dom. 1/256:30 amSTL - SJU

1 stop7h 10mUnited Airlines

vie. 1/302:05 amSJU - STL

2 stops14h 23mUnited Airlines

Deal found 12/10

$225

mar. 2/103:49 pmSTL - SJU

1 stop6h 54mFrontier

sáb. 2/215:25 pmSJU - STL

1 stop8h 34mFrontier

Deal found 12/11

$231

lun. 1/1912:47 pmSTL - SJU

1 stop11h 43mFrontier

dom. 1/255:39 pmSJU - STL

1 stop17h 42mFrontier

Deal found 12/10

$249

jue. 2/56:02 pmSTL - SJU

1 stop14h 46mAmerican Airlines

mar. 2/106:00 amSJU - STL

1 stop13h 22mAmerican Airlines

Deal found 12/11

$298

dom. 12/149:54 amSTL - SJU

1 stop22h 01mFrontier

dom. 12/2110:08 amSJU - STL

1 stop25h 37mFrontier

Deal found 12/11

$285

mié. 2/113:49 pmSTL - SJU

1 stop9h 04mFrontier

sáb. 2/215:25 pmSJU - STL

1 stop8h 34mFrontier

Deal found 12/11

$311

Last-minute flights from St. Louis to Luis Munoz Marin Intl
Discover last-minute flight deals from St. Louis to Luis Munoz Marin Intl. Data last updated diciembre 12, 2025 and is based on user searches.

mié. 1/75:11 pmSTL - SJU

1 stop7h 39mFrontier

mié. 1/147:34 pmSJU - STL

1 stop29h 00mFrontier

Deal found 12/11

$148

jue. 1/85:11 pmSTL - SJU

1 stop7h 39mFrontier

dom. 1/119:23 pmSJU - STL

1 stop12h 42mFrontier

Deal found 12/10

$210

sáb. 1/105:11 pmSTL - SJU

1 stop21h 57mFrontier

vie. 1/163:58 amSJU - STL

1 stop20h 36mFrontier

Deal found 12/10

$167

mié. 1/215:42 pmSTL - SJU

1 stop28h 17mFrontier

mié. 1/288:00 amSJU - STL

1 stop17h 33mFrontier

Deal found 12/10

$202

sáb. 1/245:42 pmSTL - SJU

1 stop14h 12mFrontier

sáb. 1/314:36 pmSJU - STL

1 stop8h 57mFrontier

Deal found 12/10

$149

lun. 1/265:42 pmSTL - SJU

1 stop19h 44mFrontier

jue. 1/294:36 pmSJU - STL

1 stop19h 47mFrontier

Deal found 12/10

$116

lun. 1/265:42 pmSTL - SJU

1 stop28h 17mFrontier

vie. 1/3011:34 amSJU - STL

1 stop25h 37mFrontier

Deal found 12/10

$183

jue. 1/295:42 pmSTL - SJU

1 stop28h 17mFrontier

lun. 2/211:15 amSJU - STL

1 stop14h 18mFrontier

Deal found 12/10

$201

sáb. 1/315:42 pmSTL - SJU

1 stop14h 12mFrontier

dom. 2/86:00 amSJU - STL

1 stop19h 33mFrontier

Deal found 12/11

$184

One-way flights from St. Louis to Luis Munoz Marin Intl
Search for one-way flight options from St. Louis to Luis Munoz Marin Intl. Find affordable one-way fares based on user searches. Data last updated diciembre 12, 2025.

jue. 1/85:11 pmSTL - SJU

1 stop7h 39mFrontier

Deal found 12/11

$58

lun. 1/265:42 pmSTL - SJU

1 stop19h 44mFrontier

Deal found 12/11

$64

sáb. 2/285:11 pmSTL - SJU

1 stop7h 42mFrontier

Deal found 12/11

$90

mié. 1/285:42 pmSTL - SJU

1 stop28h 17mFrontier

Deal found 12/11

$96

mié. 1/77:43 pmSTL - SJU

2 stops23h 54mFrontier

Deal found 12/11

$100

mié. 2/254:51 pmSTL - SJU

2 stops17h 48mFrontier

Deal found 12/11

$101

jue. 1/110:42 amSTL - SJU

1 stop11h 55mFrontier

Deal found 12/11

$102

sáb. 1/178:32 pmSTL - SJU

1 stop16h 55mFrontier

Deal found 12/11

$103

mar. 1/611:51 amSTL - SJU

1 stop9h 53mMultiple Airlines

Deal found 12/11

$106

sáb. 1/107:43 pmSTL - SJU

2 stops29h 07mFrontier

Deal found 12/11

$107

lun. 1/54:27 pmSTL - SJU

1 stop16h 49mFrontier

Deal found 12/11

$111

Find flight deals from St. Louis to Luis Munoz Marin Intl

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$116 (Priceline)
One-way from	$58 (Frontier)
Popular in	December
Cheapest in	September
Average price	$638

Provider with most accurate pricing for Lambert-St Louis-San Juan Luis Munoz Marin Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-San Juan Luis Munoz Marin Intl flights.

Search Deals

From Lambert-St Louis to San Juan Luis Munoz Marin Intl

Search Deals

One-way flight from Lambert-St Louis to San Juan Luis Munoz Marin Intl

Search Deals

Highest demand for flights based on searches. 16% potential increase in price ($88 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

vie. 3/6

6:00 am-3:59 pm

1 stop7h 59m

San Juan Luis Munoz Marin Intl

lun. 3/9

4:09 pm-10:33 pm

1 stop7h 24m

$215

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

vie. 2/6

11:18 am-11:59 pm

1 stop10h 41m

San Juan Luis Munoz Marin Intl

lun. 2/9

4:36 pm-11:33 pm

1 stop8h 57m

$215

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

mié. 1/21

9:54 am-8:50 pm

2 stops8h 56m

San Juan Luis Munoz Marin Intl

mar. 1/27

6:00 am-3:04 pm

2 stops11h 04m

$225

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

lun. 1/26

9:57 am-10:22 pm

2 stops10h 25m

San Juan Luis Munoz Marin Intl

mié. 1/28

2:15 pm-10:58 pm

2 stops10h 43m

$225

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

mié. 1/21

9:54 am-8:50 pm

2 stops8h 56m

San Juan Luis Munoz Marin Intl

lun. 1/26

7:12 pm-9:08 am

1 stop15h 56m

$225

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

dom. 1/25

6:30 am-3:40 pm

1 stop7h 10m

San Juan Luis Munoz Marin Intl

vie. 1/30

2:05 am-2:28 pm

2 stops14h 23m

$225

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

mar. 2/10

3:49 pm-12:43 am

1 stop6h 54m

San Juan Luis Munoz Marin Intl

sáb. 2/21

5:25 pm-11:59 pm

1 stop8h 34m

$231

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

lun. 1/19

12:47 pm-2:30 am

1 stop11h 43m

San Juan Luis Munoz Marin Intl

dom. 1/25

5:39 pm-9:21 am

1 stop17h 42m

$249

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

dom. 12/14

9:54 am-9:55 am

1 stop22h 01m

San Juan Luis Munoz Marin Intl

dom. 12/21

10:08 am-9:45 am

1 stop25h 37m

$285

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

jue. 2/5

6:02 pm-10:48 am

1 stop14h 46m

San Juan Luis Munoz Marin Intl

mar. 2/10

6:00 am-5:22 pm

1 stop13h 22m

$298

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 21 results

Compare providers for flights from St. Louis to Luis Munoz Marin Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Luis Munoz Marin Intl in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
CheapTicketsDeal	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
CheapOair	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-San Juan Luis Munoz Marin Intl Airport flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on St. Louis-San Juan Luis Munoz Marin Intl Airport flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from St. Louis-San Juan Luis Munoz Marin Intl Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-San Juan Luis Munoz Marin Intl Airport flights, Cheapflights users trust CheapOair the most. CheapOair 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 St. Louis-San Juan Luis Munoz Marin Intl Airport 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 St. Louis to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from St. Louis 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 St. Louis to San Juan Luis Munoz Marin Intl Airport

Prices

Delays

How far ahead should I book a flight from St. Louis to San Juan Luis Munoz Marin Intl Airport?

Booking 75 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to San Juan Luis Munoz Marin Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from St. Louis to San Juan Luis Munoz Marin Intl Airport?

Currently, May is the cheapest month in which you can book a flight from St. Louis to San Juan Luis Munoz Marin Intl Airport (average of $140). Flying from St. Louis to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $249). 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 SJU?

When flying from St. Louis to San Juan Luis Munoz Marin Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 52% versus a flight at noon.

What is the cheapest day to fly from St. Louis to San Juan Luis Munoz Marin Intl Airport?

Travelers seeking maximum savings on their St. Louis to San Juan Luis Munoz Marin Intl Airport flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from St. Louis to San Juan Luis Munoz Marin Intl Airport?

Reviews of airlines servicing Luis Munoz Marin Intl

Read through reviews of airlines operating flights from St. Louis to San Juan Luis Munoz Marin Intl Airport, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

7.9

Good

4,253 reviews

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Delta

7.9

Good

8,008 reviews

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

United Airlines

7.4

Good

9,095 reviews

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,050 reviews

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Frontier

5.8

Fair

3,084 reviews

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

What airport do you fly from for flights from St. Louis to San Juan Luis Munoz Marin Intl?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to San Juan Luis Munoz Marin Intl. On average, Lambert-St Louis has 0 outbound flights to San Juan Luis Munoz Marin Intl per day from 6 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.
How long is the flight from St. Louis to San Juan Luis Munoz Marin Intl Airport?
Airlines like Frontier, American Airlines, and United Airlines fly from St. Louis to San Juan Luis Munoz Marin Intl Airport in about 7h 59m. The time it takes to get you to your destination can typically vary by up to 2h 26m. St. Louis and San Juan Luis Munoz Marin Intl Airport are separated by a distance of 2024 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines flying from St. Louis to San Juan Luis Munoz Marin Intl Airport round-trip?
According to our current data, Frontier ($135), Spirit Airlines ($146), and Delta ($197) offers the cheapest pricing from St. Louis to San Juan Luis Munoz Marin Intl Airport. Frontier is 70% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from St. Louis to San Juan Luis Munoz Marin Intl Airport one-way?
$84 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $110 and $112, respectively.
Can I find deals for flights from St. Louis to Luis Munoz Marin Intl that include hotel bookings?
Yes. In addition to deals on St. Louis to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Luis Munoz Marin Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Luis Munoz Marin Intl.
Can I find deals for business class flights from St. Louis to Luis Munoz Marin Intl?
Yes. Cheapflights offers flight deals from St. Louis to Luis Munoz Marin Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to San Juan Luis Munoz Marin Intl Airport?
Currently, May is the cheapest month in which you can book a flight from St. Louis to San Juan Luis Munoz Marin Intl Airport (average of $140). Flying from St. Louis to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $249). 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.

See more FAQs

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Fajardo

Rio Grande

Humacao

Luquillo

Bayamón

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Top 6 airlines flying from St. Louis to Luis Munoz Marin Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$140	Average$295	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$170	Average$334	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$205	Average$396	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$219	Average$594	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$225	Average$394	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$245	Average$527	FlexibilityNo cancel fee	On-time71%

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$58+ Cheap flights from St. Louis (STL) to Luis Munoz Marin Intl (SJU)

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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Luis Munoz Marin Intl with Cheapflights

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Cheapflights Tip: The best prices from Lambert-St Louis to San Juan Luis Munoz Marin Intl are usually found in September or April, booked 75 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from St. Louis to Luis Munoz Marin Intl

Cheapest flights from St. Louis to Luis Munoz Marin IntlExplore the most affordable flight options available from St. Louis to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

Explore the most affordable flight options available from St. Louis to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

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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.

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Best time to book a flight from St. Louis to Luis Munoz Marin Intl

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Cheapflights Insights

Everything you need to know about your flight from St. Louis to San Juan Luis Munoz Marin Intl Airport

How far ahead should I book a flight from St. Louis to San Juan Luis Munoz Marin Intl Airport?

What is the cheapest month to book a flight from St. Louis to San Juan Luis Munoz Marin Intl Airport?

What is the cheapest time of day to fly from STL to SJU?

What is the cheapest day to fly from St. Louis to San Juan Luis Munoz Marin Intl Airport?

How much does it cost to fly round-trip from St. Louis to San Juan Luis Munoz Marin Intl Airport?

How often are flights from St. Louis to San Juan delayed?

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What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on St. Louis to San Juan flights?

Reviews of airlines servicing Luis Munoz Marin Intl

Read through reviews of airlines operating flights from St. Louis to San Juan Luis Munoz Marin Intl Airport, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Luis Munoz Marin Intl. 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 from for flights from St. Louis to San Juan Luis Munoz Marin Intl?

How long is the flight from St. Louis to San Juan Luis Munoz Marin Intl Airport?

What are the cheapest airlines flying from St. Louis to San Juan Luis Munoz Marin Intl Airport round-trip?

What are the cheapest airlines to fly from St. Louis to San Juan Luis Munoz Marin Intl Airport one-way?

Can I find deals for flights from St. Louis to Luis Munoz Marin Intl that include hotel bookings?

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Can I find deals for business class flights from St. Louis to Luis Munoz Marin Intl?

What is the cheapest month to book a flight from St. Louis to San Juan Luis Munoz Marin Intl Airport?

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Alternative routes for St. Louis to Luis Munoz Marin Intl

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Top 6 airlines flying from St. Louis to Luis Munoz Marin Intl

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Cheapest flights from St. Louis to Luis Munoz Marin Intl
Explore the most affordable flight options available from St. Louis to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.