Cheap flights from Phoenix Sky Harbor Intl Airport to St. Louis from $78
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Phoenix Sky Harbor Intl Airport to St. Louis departing on 3/25. 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 Phoenix Sky Harbor Intl Airport to St. Louis
Our best Frontier deals on Phoenix Sky Harbor Intl Airport to St. Louis flight tickets
Southwest flights from Phoenix Sky Harbor Intl Airport to St. Louis
Our best Southwest deals on Phoenix Sky Harbor Intl Airport to St. Louis flight tickets
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How to get the cheapest flight ticket from Phoenix Sky Harbor Intl Airport 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, June is the cheapest month to fly from Phoenix Sky Harbor Intl Airport to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $226. The month of July is another great option to travel to St. Louis, with average flight prices from Phoenix Sky Harbor Intl Airport averaging around $226.
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 Wednesday when prices can be found for as low as $280. 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 Sunday because tickets tend to average around $450. 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 Phoenix Sky Harbor Intl Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $236 when looking at flights departing in the afternoon. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $520 per ticket.
What is the cheapest Phoenix Sky Harbor Intl to Lambert-St Louis flight route?
Fly from Phoenix Sky Harbor Intl to Lambert-St Louis for the best Phoenix Sky Harbor Intl - 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 Phoenix Sky Harbor Intl Airport when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $329 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Phoenix Sky Harbor Intl Airport for as low as $244 on momondo.
What cabin class options are available on Phoenix Sky Harbor Intl to Lambert-St Louis flights?
There are 3 cabin classes available to choose from on Phoenix Sky Harbor Intl 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 Phoenix Sky Harbor Intl to Lambert-St Louis?
Frontier, Spirit Airlines, and American Airlines are the most popular carriers operating from Phoenix Sky Harbor Intl to Lambert-St Louis
What airlines fly to St. Louis?
American Airlines, Frontier and Southwest are the top three most popular airlines that fly to St. Louis from Phoenix Sky Harbor Intl Airport according to our data. American Airlines is the first choice among our users, with 55% 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.
How many flights depart from Phoenix Sky Harbor Intl Airport to St. Louis on average per day?
As of March 2025, there are 7 flights per day flying from Phoenix Sky Harbor Intl Airport to St. Louis. The most common time of day flights depart is 7:00PM, with 45% of flights taking off at noon.
How many flights depart from Phoenix Sky Harbor Intl Airport to St. Louis on average per week?
As of March 2025, there are 50 flights per week flying from Phoenix Sky Harbor Intl Airport to St. Louis. The most common day of the week flights depart is Tue, with 20% of flights taking off on this day.
When to book flights from Phoenix Sky Harbor Intl Airport to St. Louis
Cheap Phoenix Sky Harbor Intl Airport to St. Louis (PHX to STL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Phoenix Sky Harbor Intl Airport to St. Louis
How far is Phoenix Sky Harbor Intl to Lambert-St Louis by plane?
The straight-line distance from Phoenix Sky Harbor Intl to Lambert-St Louis is 1265.4 mi. 2h 50m is a normal flight duration for this route.
When did momondo last update prices for flights from Phoenix Sky Harbor Intl Airport to Lambert-St Louis Airport?
Prices for flights from Phoenix Sky Harbor Intl Airport to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Phoenix Sky Harbor Intl Airport to Lambert-St Louis Airport?
As of March 2025, there are 5 operators available to choose from for flights from Phoenix Sky Harbor Intl Airport to Lambert-St Louis Airport.
How old do you have to be to fly from Phoenix Sky Harbor Intl Airport 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 Phoenix Sky Harbor Intl Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Phoenix Sky Harbor Intl Airport to St. Louis?
Based on momondo bookings for flights between Phoenix Sky Harbor Intl Airport and St. Louis, the leading plane model is Boeing 737 MAX 8, making up 20.71% of the total bookings. Other popular models include Boeing 737-700 Passenger/BBJ1 (winglets) with 17.68%, Boeing 737-800 Passenger/BBJ2 (winglets) with 16.67%, and Boeing 737-800 with 13.89%.
What is the most popular airline from Phoenix Sky Harbor Intl Airport to St. Louis?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Phoenix Sky Harbor Intl Airport to St. Louis is American Airlines (54% of total bookings). The next most popular airlines are Frontier (26%), Southwest (17%), and United Airlines (2%).
Best airlines flying from Phoenix Sky Harbor Intl Airport to St. Louis
Compare and see reviews for airlines that fly from Phoenix Sky Harbor Intl Airport to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $78 | Free Cancellation | Rating 6.0 3,292 reviews | |||
| PriceFrom $131 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $216 | Free Cancellation | Rating 8.0 7,944 reviews | |||
| PriceFrom $263 | Free Cancellation | Rating 7.4 8,623 reviews | |||
| PriceFrom $301 | Free Cancellation | Rating 8.0 4,292 reviews |
Southwest Flights From Phoenix Sky Harbor Intl Airport to St. Louis
Across 24 Southwest flights from Phoenix Sky Harbor Intl Airport to St. Louis this week, the average price was $447, with the best Southwest deals starting from $301 round-trip. 4,292 users have rated Southwest on momondo, with an average score of 8.0/10.
American Airlines Flights From Phoenix Sky Harbor Intl Airport to St. Louis
$131 is the best American Airlines flight deal from Phoenix Sky Harbor Intl Airport to St. Louis found on momondo over the last 72 hours. The average American Airlines ticket price found was closer to $324, however, with flight time and availability significantly affecting the price. American Airlines (7.2/10 from 10,000 user reviews) flies into St. Louis from Phoenix Sky Harbor Intl Airport 13 times in an average week so prices can vary.
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 Phoenix to St. Louis?
Finding the right flight to St. Louis from Phoenix is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.
Can I find flights from Phoenix to St. Louis with flexible booking policies on momondo?
momondo does allow users to show only those flights to St. Louis from Phoenix which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Phoenix to St. Louis?
momondo helps you find the best flight between Phoenix and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Phoenix to St. Louis right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Phoenix to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.