Cheap flights from Phoenix to St. Louis from $64
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 to St. Louis departing on 7/13. 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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American Airlines flights from Phoenix to St. Louis
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Spirit Airlines flights from Phoenix to St. Louis
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How to get the cheapest flight ticket from Phoenix 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, August is the cheapest month to fly from Phoenix to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $271. The month of September is another great option to travel to St. Louis, with average flight prices from Phoenix averaging around $288.
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 $372. 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 $449. 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 in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $321 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 $475 per ticket.
What is the cheapest Phoenix to Lambert-St Louis flight route?
Fly from Phoenix Sky Harbor Intl to Lambert-St Louis for the best Phoenix - 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 when booking 2 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $372 when searching 2 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Phoenix for as low as $306 on momondo.
What cabin class options are available on Phoenix to Lambert-St Louis flights?
There are 3 cabin classes available to choose from on Phoenix 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 to Lambert-St Louis?
Spirit Airlines, Frontier, and Southwest are the most popular carriers operating from Phoenix to Lambert-St Louis
What airlines fly to St. Louis?
American Airlines, Southwest and Frontier are the top three most popular airlines that fly to St. Louis from Phoenix according to our data. American Airlines is the first choice among our users, with 48% 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 to St. Louis on average per day?
6 flights are operational daily from Phoenix to St. Louis as of June 2025. The most popular departure time for this route is 12:00PM, with 41% of flights per day taking off in the afternoon.
How many flights depart from Phoenix to St. Louis on average per week?
As of June 2025, 46 flights take off from Phoenix and land in St. Louis each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.
Cheap Phoenix to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Phoenix to St. Louis
How far is Phoenix to Lambert-St Louis by plane?
The distance between Phoenix and Lambert-St Louis is about 1269.1 mi. Flights usually cover this in 2h 55m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Phoenix to Lambert-St Louis Airport?
Prices for flights from Phoenix to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Phoenix to Lambert-St Louis Airport?
As of June 2025, there are 5 operators available to choose from for flights from Phoenix to Lambert-St Louis Airport.
How old do you have to be to fly from Phoenix to Lambert-St Louis Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Phoenix 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.
Best airlines flying from Phoenix to St. Louis
Compare and see reviews for airlines that fly from Phoenix to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $98 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $146 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $216 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $263 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $300 | Free Cancellation | Rating 8.0 4,287 reviews |
Traveling to a place near St. Louis?
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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?
Yes. momondo enables you to select and highlight flights to St. Louis from Phoenix with this policy.
How can momondo help me find flights from Phoenix to St. Louis?
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 Phoenix to St. Louis.
I’m not ready to book a flight from Phoenix to St. Louis right now. Can momondo alert me if prices change?
Price alerts on flights to St. Louis from Phoenix are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.