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175 € Cheap Flights from St Louis to Phoenix

Compare St Louis to Phoenix flight deals

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Flight deals from St Louis to Phoenix

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Phoenix? If you want to travel next month, return fares start from 198 €. Find the lowest prices on one-way and return tickets right here.
Phoenix.175 € per passenger.Departing Tue, 18 Aug, returning Tue, 25 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Tue, 18 Aug, arriving in Phoenix Sky Harbor.Inbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Tue, 25 Aug, arriving in St Louis.Price includes taxes and charges.From 175 €, select.
Phoenix.198 € per passenger.Departing Tue, 9 Jun, returning Tue, 14 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Tue, 9 Jun, arriving in Phoenix Sky Harbor.Inbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Tue, 14 Jul, arriving in St Louis.Price includes taxes and charges.From 198 €, select.
Phoenix.198 € per passenger.Departing Wed, 17 Jun, returning Tue, 23 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 17 Jun, arriving in Phoenix Sky Harbor.Inbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Tue, 23 Jun, arriving in St Louis.Price includes taxes and charges.From 198 €, select.
Phoenix.206 € per passenger.Departing Tue, 26 May, returning Sat, 6 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Tue, 26 May, arriving in Phoenix Sky Harbor.Inbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Sat, 6 Jun, arriving in St Louis.Price includes taxes and charges.From 206 €, select.
Phoenix.210 € per passenger.Departing Fri, 10 Jul, returning Wed, 15 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Fri, 10 Jul, arriving in Phoenix Sky Harbor.Inbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Wed, 15 Jul, arriving in St Louis.Price includes taxes and charges.From 210 €, select.
Phoenix.213 € per passenger.Departing Thu, 30 Jul, returning Sun, 2 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Thu, 30 Jul, arriving in Phoenix Sky Harbor.Inbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Sun, 2 Aug, arriving in St Louis.Price includes taxes and charges.From 213 €, select.
Phoenix.215 € per passenger.Departing Tue, 26 May, returning Sun, 31 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Tue, 26 May, arriving in Phoenix Sky Harbor.Inbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Sun, 31 May, arriving in St Louis.Price includes taxes and charges.From 215 €, select.
Phoenix.215 € per passenger.Departing Wed, 30 Sep, returning Sun, 4 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 30 Sep, arriving in Phoenix Sky Harbor.Inbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Sun, 4 Oct, arriving in St Louis.Price includes taxes and charges.From 215 €, select.
Phoenix.216 € per passenger.Departing Wed, 2 Sep, returning Sun, 6 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 2 Sep, arriving in Phoenix Sky Harbor.Inbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Sun, 6 Sep, arriving in St Louis.Price includes taxes and charges.From 216 €, select.
Phoenix.217 € per passenger.Departing Thu, 1 Oct, returning Sun, 4 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Thu, 1 Oct, arriving in Phoenix Sky Harbor.Inbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Sun, 4 Oct, arriving in St Louis.Price includes taxes and charges.From 217 €, select.
Phoenix.239 € per passenger.Departing Tue, 14 Jul, returning Tue, 21 Jul.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Tue, 14 Jul, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Tue, 21 Jul, arriving in St Louis.Price includes taxes and charges.From 239 €, select.
Phoenix.239 € per passenger.Departing Tue, 26 May, returning Sat, 6 Jun.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Tue, 26 May, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Sat, 6 Jun, arriving in St Louis.Price includes taxes and charges.From 239 €, select.
Phoenix.270 € per passenger.Departing Thu, 25 Jun, returning Sat, 27 Jun.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Thu, 25 Jun, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Sat, 27 Jun, arriving in St Louis.Price includes taxes and charges.From 270 €, select.
Phoenix.271 € per passenger.Departing Fri, 31 Jul, returning Sat, 1 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Fri, 31 Jul, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Sat, 1 Aug, arriving in St Louis.Price includes taxes and charges.From 271 €, select.
Phoenix.277 € per passenger.Departing Sat, 29 Aug, returning Mon, 7 Sep.Return flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departs from St Louis on Sat, 29 Aug, arriving in Phoenix Sky Harbor.Inbound indirect flight with Allegiant Air, departs from Phoenix-Mesa Gateway on Mon, 7 Sep, arriving in St Louis.Price includes taxes and charges.From 277 €, select.
Phoenix.302 € per passenger.Departing Fri, 4 Sep, returning Mon, 7 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Fri, 4 Sep, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Mon, 7 Sep, arriving in St Louis.Price includes taxes and charges.From 302 €, select.

Find the cheapest month to fly from St Louis to Phoenix

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Phoenix flights are currently cheapest in August.
May
from 215 €
Jun
from 198 €
Jul
from 210 €
Aug
from 175 €
Sep
from 216 €
Oct
from 217 €
Nov
from 321 €
Dec
from 346 €
Jan
from 391 €
Feb
Find prices
Mar
Find prices
Apr
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Direct flights from St Louis to Phoenix

Alternative St Louis to Phoenix routes

Looking for the cheapest, fastest or easiest route from St Louis to Phoenix? You could fly into the following airports instead.

Phoenix Sky Harbor

6km from central Phoenix
ClosestCheapest
from 175 €
Search flights

Phoenix Scottsdale Municipal

24km from central Phoenix
Search flights

Phoenix-Deer Valley

27km from central Phoenix
Search flights

Phoenix-Mesa Gateway

42km from central Phoenix
from 366 €
Search flights

St Louis to Phoenix: Flight information

The things to know before you go.
Cheapest flight found175 €
Cheapest month to flyAugust
Average flight time3 hrs, 22 mins
Most popular airlineSouthwest Airlines
Average flights per week60

Finding cheap flights from St Louis to Phoenix: Frequently asked questions

There are 4 airports in Phoenix: Phoenix Sky Harbor, Phoenix Scottsdale Municipal, Phoenix-Deer Valley, and Phoenix-Mesa Gateway.
The best price we found for a return flight from St Louis to Phoenix is 175 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
3 hours and 22 minutes is the average flight time from St Louis to Phoenix.
Southwest Airlines, American Airlines and Alaska Airlines fly direct from St Louis to Phoenix.
As of May 2026, there are 60 flights per week flying from St Louis to Phoenix.
The cheapest month to fly from St Louis to Phoenix is usually August.
If you're flying from St Louis Airport, the cheapest airport near Phoenix is Phoenix Sky Harbor – which is 6.0 km away from the centre of Phoenix. We've found flights into this airport from 175 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Phoenix on Tuesday, 18 August 2026.
Yes – the average flight time is 3 hours and 22 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Phoenix but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Phoenix is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 25°C. July is typically the warmest month in Phoenix, when it usually averages around 40°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 4°C. The rainiest month is August.
Currently, Frontier Airlines and Southwest Airlines offer the cheapest flight tickets to Phoenix.

Flying from St Louis Lambert International Airport (STL) to Phoenix: what you need to know

  • Jump on a direct flight from St Louis Lambert International Airport to Phoenix and you'll be travelling for an average of 2 hours 55 minutes.

  • The timezone in Phoenix is UTC-7. The city is one hour behind St Louis, where St Louis Lambert International Airport is located.

  • The busiest flight route is from St Louis Lambert International Airport (STL) to Phoenix Sky Harbour International Airport (PHX). You can pick from 37 services between these airports each week.

  • Allow plenty of time to get on your STL to Phoenix flight. A good rule of thumb is to arrive two hours before international departures and an hour ahead for domestic flights.

  • You'll likely experience longer queues during popular months like July. Arriving up to four hours in advance for international flights and two hours for a domestic departure is a smart move.

  • Start your trip at STL and fly nonstop to Phoenix Sky Harbour International Airport (PHX). That's where you can expect to touch down when searching for St Louis Lambert International Airport to Phoenix tickets.

  • Leading carriers that offer direct flights from St Louis Lambert International Airport to Phoenix include:

  • Located around 16 kilometres from the centre of St Louis, STL can be reached in about 25 minutes by car (depending on traffic). Travelling on public transport takes roughly 30 minutes.

  • Booked an early flight from St Louis Lambert International Airport to Phoenix? Avoid the hassle of rushing to the terminal (and sneak in some extra snooze time) by choosing one of these hotels near STL:

  • Of the departures from St Louis Lambert International Airport, 76% land on time at their destination.

  • STL is located at 10701 Lambert International Blvd..

How to find the cheapest flights from St Louis Lambert International Airport (STL) to Phoenix

  • The best price we've seen for a one-way St Louis Lambert International Airport to Phoenix flight is 99 €. The cheapest price for a return flight is 175 €. Bear in mind fares may change due to availability at the time of booking.

  • Don't leave everything to the last minute. You're more likely to find cheap flights from STL to Phoenix if you book in advance. Airlines often have some amazing early bird discounts.

  • Finding cheap tickets from St Louis Lambert International Airport to Phoenix is easier if you can be flexible with your travel plans. Try using the 'Whole month' search tool to get the lowest prices throughout the month and score an epic deal.

  • Picking up a cheap flight from STL to Phoenix is easy with Price Alerts. Simply set up one of these automatic notifications and we'll notify you when a deal gets even better.

  • Tailor your flights with filters. Pick your preferred departure and arrival times, airlines and total journey duration. You can also sort your results by 'Cheapest,' 'Best' or 'Fastest' flights from St Louis Lambert International Airport to Phoenix.

Airports in Phoenix

Phoenix Sky Harbour International Airport (PHX)

  • The distance from Phoenix Sky Harbour International Airport (PHX) to central Phoenix is roughly 5 kilometres. It'll take you around 10 minutes to reach the centre driving.

  • It typically takes 25 minutes if you're using public transport.

  • Think about booking a hotel close to PHX if you have a late flight from St Louis Lambert International Airport to Phoenix. Check in to one of these accommodation options and make your first night all about rest:

  • Reserving your ride from Phoenix Sky Harbour International Airport about one week ahead of your flight from STL to Phoenix can help you lock in the lowest rate.

  • You'll find PHX at 3400 Sky Harbour Boulevard.

Phoenix-Mesa Gateway Airport (AZA)

  • Central Phoenix is about 32 kilometres from Phoenix-Mesa Gateway Airport (AZA). Once your flight from St Louis Lambert International Airport to Phoenix has hit the runway and you've made your way out of the airport, expect a drive of about 30 minutes.

  • You can expect the trip to take about 1 hour 15 minutes on public transport.

  • You'll find some great places to rest your head close to AZA. Unwind and get cosy after your STL to Phoenix flight at any of these well-located options:

  • Avoid paying more than you need to. Securing your ride two weeks ahead of your arrival at AZA can help you lock in a better rate.

  • You can find Phoenix-Mesa Gateway Airport at 6033 S. Sossaman Rd..

Best time to go to Phoenix

  • It's time to figure out your trip dates for your flight from St Louis Lambert International Airport to Phoenix. March is the most popular month for a trip to Phoenix. If you like a more relaxed vibe, go in October.

  • Lock in a St Louis Lambert International Airport to Phoenix plane ticket with a departure in July to explore the city during its warmest month. You can expect temperatures to range from 27ºC (81ºF) to 45ºC (113ºF).

  • Search for cheap tickets from STL to Phoenix in January if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between 4ºC (39ºF) and 21ºC (70ºF) on average.

More about Phoenix

  • Start your Phoenix trip off on the right foot by choosing the perfect place to stay. As soon as you've booked your flight from St Louis Lambert International Airport to Phoenix, explore our selection of accommodation options including:

  • All great journeys should include a little sightseeing. Yayoi Kusama Fireflies Infinity Mirror Room, Camelback Mountain and Heard Museum are essential stops on your Phoenix itinerary.

Explore more of the United States

  • Phoenix is easy to fall in love with, but there are so many other corners of the United States just waiting to be explored. Around 483 kilometres west of Phoenix, a trip to San Diego will keep your itinerary packed. Start with attractions like San Diego Zoo, San Diego Balboa Park and USS Midway Museum.

  • Around 418 kilometres northwest of Phoenix, Las Vegas is another favourite stop in the United States. Experience the best of this destination with a visit to Ciudad del Pecado o Las Vegas, Las Vegas Strip and Fountains of Bellagio.

Plan the rest of your trip from St Louis to Phoenix

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.