Cheap flights from Puerto Rico to St. Louis from $84
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Puerto Rico to St. Louis departing on 10/10. 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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Frontier flights from Puerto Rico to St. Louis
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Spirit Airlines flights from Puerto Rico to St. Louis
Our best Spirit Airlines deals on Puerto Rico to St. Louis flight tickets
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How to get the cheapest flight ticket from Puerto Rico to St. Louis
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 St. Louis?
In general, January is the cheapest month to fly from Puerto Rico to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $286. The month of April is another great option to travel to St. Louis, with average flight prices from Puerto Rico averaging around $326.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $349. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $695. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Puerto Rico in the evening is the least expensive time of day to depart. momondo users have found prices as low as $282 when looking at flights departing in the evening. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $695 per ticket.
What is the cheapest Puerto Rico to Lambert-St Louis flight route?
Fly from San Juan Luis Munoz Marin Intl to Lambert-St Louis for the best Puerto Rico - Lambert-St Louis flight prices
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from Puerto Rico when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $412 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Puerto Rico for as low as $273 on momondo.
What cabin class options are available on Puerto Rico to Lambert-St Louis flights?
There are 1 cabin classes available to choose from on Puerto Rico to Lambert-St Louis 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 Puerto Rico to Lambert-St Louis?
Frontier, Spirit Airlines, and United Airlines are the most popular carriers operating from Puerto Rico to Lambert-St Louis
What airlines fly to St. Louis?
Delta, American Airlines and Frontier are the top three most popular airlines that fly to St. Louis from Puerto Rico according to our data. Delta is the first choice among our users, with 40% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
Cheap Puerto Rico to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Puerto Rico to St. Louis
When did momondo last update prices for flights from Puerto Rico to Lambert-St Louis Airport?
Prices for flights from Puerto Rico to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Puerto Rico to Lambert-St Louis Airport?
The number of operators available for flights from Puerto Rico to Lambert-St Louis Airport is 5 as of June 2025.
How old do you have to be to fly from Puerto Rico to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Puerto Rico to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents you'll need for your trip to Lambert-St Louis Airport 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 Lambert-St Louis Airport. 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 Puerto Rico to St. Louis?
Based on momondo bookings for flights between Puerto Rico and St. Louis, the leading plane model is Boeing 737 MAX 8, making up 27.78% of the total bookings. Other popular models include Airbus A321neo with 16.67%, Airbus A321-100/200 with 11.11%, and Airbus A320neo with 5.56%.
Best airlines flying from Puerto Rico to St. Louis
Compare and see reviews for airlines that fly from Puerto Rico to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $163 | Free Cancellation | Rating 5.9 3,296 reviews | |||
| PriceFrom $244 | Free Cancellation | Rating 8.0 7,966 reviews | |||
| PriceFrom $254 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $255 | Free Cancellation | Rating 7.4 8,840 reviews | |||
| PriceFrom $279 | Free Cancellation | Rating 8.0 4,278 reviews |
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Puerto Rico to St. Louis?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Puerto Rico to St. Louis. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Puerto Rico to St. Louis with flexible booking policies on momondo?
Yes. All flights to St. Louis from Puerto Rico on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Puerto Rico to St. Louis?
Once all potential Puerto Rico to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Puerto Rico to St. Louis right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Puerto Rico to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.