Vuelos de Frontier Airlines de Phoenix (PHX) a St. Louis (STL) desde $64

Ensure you go to our Covid-19 Travel Advisor to see if there are any current quarantine requirements and travel advice reports in place in STL when flying from PHX.

Once you’ve received your ticket for your flight from Phoenix Sky Harbor Airport to Lambert Field, you should be able to see exactly which terminals Frontier Airlines flies into and out of. If not, ask your carrier or do some online research for that information.

You won’t find any direct flights with Frontier Airlines from Phoenix Sky Harbor Airport to Lambert-St. Louis Intl. Airport (STL). You will have a stopover, so use this time to go for a stroll and stretch out those legs before boarding your connecting flight.

Your Frontier Airlines flight from Sky Harbor Intl. Airport (PHX) to St. Louis Lambert International Airport should take around 4 hours and 3 minutes. But there are tons of things you can do to distract yourself from staring at your watch. Talking to the passenger beside you about their travel plans is one of them. If you’d rather a different type of in-flight entertainment, you could always listen to an audio book.

The route is well traveled from PHX to Lambert Field. Frontier Airlines links the two approximately 9 times weekly.

For more info about changing your flight to STL, please visit our Customer Service Portal.

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.