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Cheap flights from St Louis (STL) to San Juan (SJU)

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How to find the cheapest flight from
St Louis (STL) to San Juan (SJU)

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

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Travelers have found it’s best to book a flight 41 days in advance to save up to 11% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 41 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St Louis to San Juan 1-2 weeks in advance for as low as $380, or $415 for flights within the next 24 hours.

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

September can be a great time to fly to San Juan from St Louis with a flight ticket averaging about $380. Cheapflights users have found deals in the month of September for as cheap as $194. The most expensive prices can be found in the month of December.

When is the cheapest time to fly from St Louis to San Juan (STL - PR1)?

One of the essential ways to save on airfare from St Louis to San Juan is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 29% on airfare.

Cheap flights from St Louis to San Juan in September, October 2020

The best prices found for STL to SJU flights for September, October
23 Oct - 26 Oct
$221pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SJU
San Juan Luis Munoz Marin Intl
SJU
San Juan Luis Munoz Marin Intl
Frontier
     
3 STOPS
STL
Lambert-St Louis
9 Oct - 31 Oct
$228pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SJU
San Juan Luis Munoz Marin Intl
SJU
San Juan Luis Munoz Marin Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
9 Oct - 16 Oct
$239pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SJU
San Juan Luis Munoz Marin Intl
SJU
San Juan Luis Munoz Marin Intl
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

St Louis to San Juan 2020 flight deals

Cheap flights to San Juan from St Louis found for this year
23 Oct - 26 Oct
$221pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SJU
San Juan Luis Munoz Marin Intl
SJU
San Juan Luis Munoz Marin Intl
Frontier
     
3 STOPS
STL
Lambert-St Louis
9 Oct - 31 Oct
$228pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SJU
San Juan Luis Munoz Marin Intl
SJU
San Juan Luis Munoz Marin Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
9 Oct - 16 Oct
$239pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SJU
San Juan Luis Munoz Marin Intl
SJU
San Juan Luis Munoz Marin Intl
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

Last minute flights from St Louis to San Juan

Late deals on round-trip flights to San Juan from St Louis, departing today and this week
30 Sep - 5 Oct
$278pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SJU
San Juan Luis Munoz Marin Intl
SJU
San Juan Luis Munoz Marin Intl
Frontier
     
3 STOPS
STL
Lambert-St Louis
1 Oct - 5 Oct
$315pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SJU
San Juan Luis Munoz Marin Intl
SJU
San Juan Luis Munoz Marin Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
1 Oct - 4 Oct
$326pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
SJU
San Juan Luis Munoz Marin Intl
SJU
San Juan Luis Munoz Marin Intl
Frontier
 
1 STOP
STL
Lambert-St Louis

One-way flights to San Juan from St Louis

The cheapest one-way flights from St Louis to San Juan
1:00 pm - 11:16 am
Sun Country Air
2 Stops
44h 16m
STL - SJU
Sun Country Air
8:10 am - 5:54 pm
Delta
1 Stop
7h 44m
STL - SJU
Delta
$353
Delta
4:25 am - 9:09 pm
Multiple Airlines
3 Stops
14h 44m
STL - SJU
Multiple Airlines
$406
KAYAK

Related info for your journey

Useful info, stats and facts about St Louis to San Juan flights.

Flight FAQs

From St Louis to San Juan

Are flight prices decreasing from St Louis to San Juan due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both St Louis and San Juan for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from St Louis to San Juan for under $300 on Cheapflights?

Yes, there are multiple flights from St Louis to San Juan for under $300. The cheapest flight booked recently is on Multiple Airlines for just $221, but on average you can expect to pay $272.

Are there nonstop flights from St Louis to San Juan for under $200 on Cheapflights?

There are no nonstop flights from St Louis to San Juan, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from St Louis to San Juan for under $300?

There are currently 11+ open flights from St Louis to San Juan within the next 7 days for less than $300.

Is St Louis weather warmer or cooler than San Juan?

Temperatures around the 90 °F's can be experienced in June. The weather in San Juan is hotter than in St Louis. Plan for potential changes in flight availability as peak weather approaches in this location.

How long is the flight from St Louis to San Juan?

Airlines like Delta fly from St Louis to San Juan in about 7h 44m. The time it takes to get you to your destination can typically vary by up to .

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

Cheapflights users have booked flights from St Louis to San Juan round-trip from $310.

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

$180 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Sun Country Air, with prices from $224.

Alternative routes for St Louis to San Juan

Destination information for San Juan

Things to know before you go. Useful info for your trip from St Louis to San Juan
Today's exchange rate
$1 = $1.00
Average temperature for September in San Juan
89.6 °F
Avg rainfall for September in San Juan
5.7 ″

Airports servicing St. Louis

Airports servicing San Juan

San Juan Isla Grande (SIG)
Home Caribbean Puerto Rico San Juan Cheap flights from St Louis to San Juan