Cheap flights from St. Louis to Puerto Rico from $96
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Puerto Rico departing on 7/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from St. Louis to Puerto Rico
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Puerto Rico?
If you don’t want to visit Puerto Rico in September, then you should wait until August to fly from St. Louis, when ticket prices are also cheap, with an average price of $351.
What is the cheapest day to depart on your flight to Puerto Rico?
On average, the least expensive day to fly to Puerto Rico from St. Louis is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $404. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Puerto Rico is Saturday, with ticket prices averaging around $645.
What is the cheapest time of day to depart on your flight to Puerto Rico?
Our most recent data shows that the best time of day to fly to Puerto Rico is in the evening. Flights from St. Louis to Puerto Rico during this time can be as low as $310. In contrast, the most expensive time of day to depart to Puerto Rico is at noon when prices are around $660.
What is the cheapest Lambert-St Louis to Puerto Rico flight route?
Fly from Lambert-St Louis to San Juan Luis Munoz Marin Intl for the best Lambert-St Louis - Puerto Rico flight prices
How far in advance should I book a flight to Puerto Rico?
You are more likely to see cheaper flights to Puerto Rico from St. Louis when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to Puerto Rico for around $441 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Puerto Rico from St. Louis for as low as $333 on momondo.
What cabin class options are available on Lambert-St Louis to Puerto Rico flights?
There are 1 cabin classes available to choose from on Lambert-St Louis to Puerto Rico flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Lambert-St Louis to Puerto Rico?
Spirit Airlines, Frontier, and United Airlines are the most popular carriers operating from Lambert-St Louis to Puerto Rico
What airlines fly to Puerto Rico?
American Airlines, Delta and Frontier are the top three most popular airlines that fly to Puerto Rico from St. Louis according to our data. American Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Puerto Rico. Keep in mind that there are 6 different airlines that fly to Puerto Rico on a routine basis, so you have a few additional options to choose from.
Cheap St. Louis to Puerto Rico flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Puerto Rico
When did momondo last update prices for flights from Lambert-St Louis Airport to Puerto Rico?
Prices for flights from Lambert-St Louis Airport to Puerto Rico are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Puerto Rico?
The number of operators available for flights from Lambert-St Louis Airport to Puerto Rico is 6 as of June 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Puerto Rico?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Puerto Rico.
What documentation or ID do you need to fly to Puerto Rico?
The travel and health documents you'll need for your trip to Puerto Rico may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Puerto Rico. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from St. Louis to Puerto Rico?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from St. Louis to Puerto Rico is Boeing 737 MAX 8 (87.50% of total bookings). The next most popular plane model is Boeing 737-700 Passenger/BBJ1 (winglets) (12.50%).
Best airlines flying from St. Louis to Puerto Rico
Compare and see reviews for airlines that fly from St. Louis to Puerto Rico with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $140 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $155 | Free Cancellation | Rating 6.3 8,052 reviews | |||
| PriceFrom $219 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $244 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $254 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $351 | Free Cancellation | Rating 8.0 4,287 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Puerto Rico?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Puerto Rico from St. Louis.
Can I find flights from St. Louis to Puerto Rico with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for St. Louis to Puerto Rico flights to just show those with flexible booking policies.
How can momondo help me find flights from St. Louis to Puerto Rico?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Puerto Rico.
I’m not ready to book a flight from St. Louis to Puerto Rico right now. Can momondo alert me if prices change?
Yes. momondo can track prices for St. Louis to Puerto Rico flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.