Find Cheap Flights from Phoenix to St. Louis (PHX - STL)

Flights overview

Useful information for finding cheap flights from Phoenix to St. Louis and booking your next trip

Cheapest round-trip flights	$210	Frontier 1 stop 22 hr Thu, May 28 — Sun, May 31	The cheapest round-trip flight from Phoenix to St. Louis is currently $210
Cheapest one-way flight	$86	Frontier 1 stop 20 hr Sat, May 23	The cheapest one-way flight from Phoenix to St. Louis is currently $86
Cheapest nonstop flights	$405	American Nonstop 4 hr Fri, Jul 3 — Sun, Jul 5	The cheapest nonstop round-trip flight from Phoenix to St. Louis is currently $405
Last-minute weekend getaway	$260	Frontier 1 stop 11 hr Sat, May 9 — Sun, May 10	The cheapest last-minute weekend getaway from Phoenix to St. Louis is currently $260
Cheapest business class flights	$458	Frontier 1 stop 23 hr Fri, May 29 — Mon, Jun 1	The cheapest business class round-trip flight from Phoenix to St. Louis is currently $458

Fastest flight	2 hr 50 min	The fastest nonstop flight from Phoenix to St. Louis takes 2 hr 50 min
Nonstop flights	Every day	There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from Phoenix to St. Louis is typically November. The most expensive month to fly is typically June.

November Cheapest	Typical prices: $130–325
June Most expensive	Typical prices: $225–350

Popular airlines from Phoenix to St. Louis

Southwest

Nonstop

from $405

Typical price: $295–450

33 weekly nonstop flights

PHX - STL Every day

1057 weekly connecting flights

PHX - STL Every day
American

Nonstop

from $405

Typical price: $290–460

14 weekly nonstop flights

PHX - STL Every day

548 weekly connecting flights

PHX - STL Every day
Delta

from $416

Typical price: $320–640

227 weekly connecting flights

PHX - STL Every day
United

from $307

Typical price: $310–500

212 weekly connecting flights

PHX - STL Every day
Frontier

from $210

Typical price: $160–355

28 weekly connecting flights

PHX - STL Every day
Alaska

from $582

Typical price: $440–900

21 weekly connecting flights

PHX - STL Every day

Popular airports near Phoenix

Phoenix Sky Harbor International Airport (PHX)

Phoenix United States 12 min 3 mi
Mesa Gateway Airport (AZA)

Phoenix United States 25 mi
Tucson International Airport (TUS)

Tucson United States 1 hr 54 min 112 mi
Scottsdale Airport (SCF)

Phoenix United States 31 min 15 mi

Popular airports near St. Louis

St. Louis Lambert International Airport (STL)

St. Louis United States 21 min 12 mi
General Wayne A. Downing Peoria International Airport (PIA)

Peoria United States 2 hr 36 min 143 mi
Columbia Regional Airport (COU)

Columbia United States 2 hr 8 min 109 mi
Indianapolis International Airport (IND)

Indianapolis United States 3 hr 30 min 222 mi

Frequently asked questions about flying from Phoenix to St. Louis

The cheapest flights from Phoenix to St. Louis are usually in November. Typical ticket prices in November range from $130 to $325.

The cheapest round-trip flight from Phoenix to St. Louis recently found on Google Flights was with Frontier from $210. The cheapest one-way flight was with Frontier from $86.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest Southwest flight from Phoenix to St. Louis is $405, flying from Jul 3 to Jul 6.
The cheapest American flight from Phoenix to St. Louis is $405, flying from Jul 3 to Jul 5.
The cheapest Delta flight from Phoenix to St. Louis is $416, flying from Jun 6 to Jun 8.
The cheapest United flight from Phoenix to St. Louis is $307, flying from Jun 4 to Jun 8.
The cheapest Frontier flight from Phoenix to St. Louis is $210, flying from May 28 to May 31.
The cheapest Alaska flight from Phoenix to St. Louis is $582, flying from Jun 4 to Jun 7.

The cheapest round-trip flight from Phoenix to St. Louis starts at $210 from Thu, May 28 to Sun, May 31. The cheapest one-way flight starts at $86 and departs on Sat, May 23.

2 hr 50 min is the shortest flight time from Phoenix to St. Louis.

Apr–Sep is the most popular time to visit, coinciding with hot, humid summer and events like Fair St. Louis, a huge Fourth of July festival at Forest Park, and the Taste of St. Louis food festival (Sep). Weather in winter is cold, with occasional snow.

It's easy to use Google Flights to find the cheapest days to fly from Phoenix to St. Louis.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.

What counts as the best airline for your flights from Phoenix to St. Louis really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from Phoenix to St. Louis.

In terms of nonstop flights, Southwest is the most popular. Southwest offers 33 nonstop flights and 1,057 connecting flights per week. Southwest flies from Phoenix Sky Harbor International Airport (PHX) to St. Louis Lambert International Airport (STL) .

Other popular airlines flying from Phoenix to St. Louis are:

American offers 14 nonstop flights and 548 connecting flights per week. American flies from Phoenix Sky Harbor International Airport (PHX) to St. Louis Lambert International Airport (STL) .
Delta offers 227 connecting flights per week. Delta flies from Phoenix Sky Harbor International Airport (PHX) to St. Louis Lambert International Airport (STL) .
United offers 212 connecting flights per week. United flies from Phoenix Sky Harbor International Airport (PHX) to St. Louis Lambert International Airport (STL) .
Frontier offers 28 connecting flights per week. Frontier flies from Phoenix Sky Harbor International Airport (PHX) to St. Louis Lambert International Airport (STL) .
Alaska offers 21 connecting flights per week. Alaska flies from Phoenix Sky Harbor International Airport (PHX) to St. Louis Lambert International Airport (STL) .

The number of connecting flights refers to distinct flights with at least one stop between Phoenix and St. Louis.

The cheapest round-trip flight from Phoenix to St. Louis recently found on Google Flights was with Frontier from $210. The cheapest one-way flight was with Frontier from $86.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest Southwest flight from Phoenix to St. Louis is $405, flying from Jul 3 to Jul 6.
The cheapest American flight from Phoenix to St. Louis is $405, flying from Jul 3 to Jul 5.
The cheapest Delta flight from Phoenix to St. Louis is $416, flying from Jun 6 to Jun 8.
The cheapest United flight from Phoenix to St. Louis is $307, flying from Jun 4 to Jun 8.
The cheapest Frontier flight from Phoenix to St. Louis is $210, flying from May 28 to May 31.
The cheapest Alaska flight from Phoenix to St. Louis is $582, flying from Jun 4 to Jun 7.

Southwest and American fly direct from Phoenix to St. Louis.

There are 33 Southwest direct flights from Phoenix to St. Louis per week. Flights are available every day.
There are 14 American direct flights from Phoenix to St. Louis per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

The cheapest last-minute deal between Phoenix and St. Louis at price $260 is offered by Frontier from Sat, May 9 to Sun, May 10.

Southwest and American fly direct from Phoenix to St. Louis.

There are 33 Southwest direct flights from Phoenix to St. Louis per week. Flights are available every day.
There are 14 American direct flights from Phoenix to St. Louis per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

There are direct flights from Phoenix to St. Louis on a daily basis.

The cheapest direct (nonstop) round-trip flights between Phoenix and St. Louis start at $405 from Fri, Jul 3 to Sun, Jul 5 with American.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Phoenix to St. Louis, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.

The cheapest business class round-trip flights between Phoenix and St. Louis start at $458 from Fri, May 29 to Mon, Jun 1 with Frontier.

The cheapest economy class round-trip flights between Phoenix and St. Louis start at $210 from Thu, May 28 to Sun, May 31.

To book business class trips from Phoenix to St. Louis, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.

The best last-minute getaway deal for the next weekend between Phoenix and St. Louis starts at $260 from Sat, May 9 to Sun, May 10 with Frontier.

The cheapest last-minute deal between Phoenix and St. Louis at price $260 is offered by Frontier from Sat, May 9 to Sun, May 10.

To find last-minute flight deals from Phoenix to St. Louis, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.