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	$130	Frontier 1 stop 24 hr Thu, Jan 22 — Mon, Jan 26	The cheapest round-trip flight from Phoenix to St. Louis is currently $130
Cheapest one-way flight	$60	Frontier Nonstop 3 hr Fri, Dec 12	The cheapest one-way flight from Phoenix to St. Louis is currently $60
Cheapest nonstop flights	$120	Frontier Nonstop 3 hr Fri, Dec 12 — Mon, Dec 15	The cheapest nonstop round-trip flight from Phoenix to St. Louis is currently $120
Last-minute weekend getaway	$223	Frontier Nonstop 3 hr Fri, Nov 21 — Mon, Nov 24	The cheapest last-minute weekend getaway from Phoenix to St. Louis is currently $223
Cheapest business class flights	$870	Delta 1 stop 9 hr Sat, Jan 24 — Sun, Jan 25	The cheapest business class round-trip flight from Phoenix to St. Louis is currently $870

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 January. The most expensive month to fly is typically June.

January Cheapest	Typical prices: $125–295
June Most expensive	Typical prices: $235–360

Popular airlines from Phoenix to St. Louis

Southwest

Nonstop

from $229

Typical price: $295–510

30 weekly nonstop flights

PHX - STL Every day

1254 weekly connecting flights

PHX - STL Every day
American

Nonstop

from $194

Typical price: $295–550

14 weekly nonstop flights

PHX - STL Every day

480 weekly connecting flights

PHX - STL Every day
United

from $253

Typical price: $315–570

245 weekly connecting flights

PHX - STL Every day
Delta

from $233

Typical price: $315–660

204 weekly connecting flights

PHX - STL Every day
Frontier

Nonstop

from $130

Typical price: $150–390

2 weekly nonstop flights

PHX - STL Every Mon, Fri

38 weekly connecting flights

PHX - STL Every day
Alaska

from $322

Typical price: $460–930

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 41 min 25 mi
Tucson International Airport (TUS)

Tucson United States 1 hr 53 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
MidAmerica St. Louis Airport (BLV)

Belleville United States 34 min 20 mi
General Wayne A. Downing Peoria International Airport (PIA)

Peoria United States 2 hr 35 min 143 mi
Indianapolis International Airport (IND)

Indianapolis United States 3 hr 28 min 222 mi

Frequently asked questions about flying from Phoenix to St. Louis

When are the cheapest days to fly from Phoenix to St. Louis?

The cheapest flights from Phoenix to St. Louis are usually in January. Typical ticket prices in January range from $125 to $295.

Which airlines provide the cheapest flights from Phoenix to St. Louis?

The cheapest round-trip flight from Phoenix to St. Louis recently found on Google Flights was with Frontier from $130. The cheapest one-way flight was with Frontier from $60.

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

The cheapest Southwest flight from Phoenix to St. Louis is $229, flying from Dec 11 to Dec 15.
The cheapest American flight from Phoenix to St. Louis is $194, flying from Dec 13 to Dec 15.
The cheapest United flight from Phoenix to St. Louis is $253, flying from Jan 17 to Jan 18.
The cheapest Delta flight from Phoenix to St. Louis is $233, flying from Dec 13 to Dec 15.
The cheapest Frontier flight from Phoenix to St. Louis is $130, flying from Jan 22 to Jan 26.
The cheapest Alaska flight from Phoenix to St. Louis is $322, flying from Jan 29 to Feb 1.

What are the cheapest flights from Phoenix to St. Louis?

The cheapest round-trip flight from Phoenix to St. Louis starts at $130 from Thu, Jan 22 to Mon, Jan 26. The cheapest one-way flight starts at $60 and departs on Fri, Dec 12.

How long does it take to fly from Phoenix to St. Louis?

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

When should you fly to St. Louis, United States?

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.

How do I find cheap dates to fly from Phoenix to St. Louis?

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 is the best airline to fly from Phoenix to St. Louis?

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 30 nonstop flights and 1,254 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 480 connecting flights per week. American flies from Phoenix Sky Harbor International Airport (PHX) to St. Louis Lambert International Airport (STL) .
United offers 245 connecting flights per week. United flies from Phoenix Sky Harbor International Airport (PHX) to St. Louis Lambert International Airport (STL) .
Delta offers 204 connecting flights per week. Delta flies from Phoenix Sky Harbor International Airport (PHX) to St. Louis Lambert International Airport (STL) .
Frontier offers 2 nonstop flights and 38 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.

Which airlines provide the cheapest flights from Phoenix to St. Louis?

The cheapest round-trip flight from Phoenix to St. Louis recently found on Google Flights was with Frontier from $130. The cheapest one-way flight was with Frontier from $60.

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

The cheapest Southwest flight from Phoenix to St. Louis is $229, flying from Dec 11 to Dec 15.
The cheapest American flight from Phoenix to St. Louis is $194, flying from Dec 13 to Dec 15.
The cheapest United flight from Phoenix to St. Louis is $253, flying from Jan 17 to Jan 18.
The cheapest Delta flight from Phoenix to St. Louis is $233, flying from Dec 13 to Dec 15.
The cheapest Frontier flight from Phoenix to St. Louis is $130, flying from Jan 22 to Jan 26.
The cheapest Alaska flight from Phoenix to St. Louis is $322, flying from Jan 29 to Feb 1.

Which airlines have direct flights from Phoenix to St. Louis?

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

There are 30 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.
There are 2 Frontier direct flights from Phoenix to St. Louis per week. Flights are available on Monday and Friday.

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

Which airline provides the cheapest last-minute getaway flight from Phoenix to St. Louis?

The cheapest last-minute deal between Phoenix and St. Louis at price $223 is offered by Frontier from Fri, Nov 21 to Mon, Nov 24.

Which airlines have direct flights from Phoenix to St. Louis?

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

There are 30 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.
There are 2 Frontier direct flights from Phoenix to St. Louis per week. Flights are available on Monday and Friday.

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

When are direct flights from Phoenix to St. Louis available?

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

What are the cheapest direct flights from Phoenix to St. Louis?

The cheapest direct (nonstop) round-trip flights between Phoenix and St. Louis start at $120 from Fri, Dec 12 to Mon, Dec 15 with Frontier.

How can I find nonstop flights from Phoenix to St. Louis?

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.

What are the cheapest business class flights from Phoenix to St. Louis?

The cheapest business class round-trip flights between Phoenix and St. Louis start at $870 from Sat, Jan 24 to Sun, Jan 25 with Delta.

What are the cheapest economy class flights from Phoenix to St. Louis?

The cheapest economy class round-trip flights between Phoenix and St. Louis start at $130 from Thu, Jan 22 to Mon, Jan 26.

How can I book business class trips from Phoenix to St. Louis?

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.

Are there any last-minute deals from Phoenix to St. Louis next weekend?

The best last-minute getaway deal for the next weekend between Phoenix and St. Louis starts at $223 from Fri, Nov 21 to Mon, Nov 24 with Frontier.

Which airline provides the cheapest last-minute getaway flight from Phoenix to St. Louis?

The cheapest last-minute deal between Phoenix and St. Louis at price $223 is offered by Frontier from Fri, Nov 21 to Mon, Nov 24.

How can I find last-minute flight deals from Phoenix to St. Louis?

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.