Cheap Flights from Phoenix to St Louis

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      Travellers and cabin class, 1 Adult, Economy

      Compare Phoenix to St Louis flight deals

      Find the cheapest month or even day of the year to fly to St Louis

      Book the best St Louis fare with no extra fees

      Flight deals from Phoenix to St Louis

      Looking for a cheap last-minute deal or the best return flight from Phoenix to St Louis? Find the lowest prices on one-way and return tickets right here.

      Find the cheapest month to fly from Phoenix to St Louis

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Phoenix to St Louis flights are currently cheapest in July.

      Direct flights from Phoenix to St Louis

      Phoenix to St Louis: Alternative routes

      Compare routes from Phoenix to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

      Phoenix to St Louis: Flight information

      The things to know before you go.
      Cheapest flight foundCHF 65
      Cheapest month to flyJuly
      Average flight time2 hrs, 59 mins
      Most popular airlineSouthwest Airlines
      Average flights per week58

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

      The best price we found for a return flight from Phoenix to St Louis is CHF 130. 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.
      2 hours and 59 minutes is the average flight time from Phoenix to St Louis.
      Southwest Airlines, American Airlines and Alaska Airlines fly direct from Phoenix to St Louis.
      As of July 2025, there are 58 flights per week flying from Phoenix to St Louis.
      The cheapest month to fly from Phoenix to St Louis is usually July.
      After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Phoenix to St Louis Airport on Saturday, 19 July 2025.
      Yes – the average flight time is 2 hours and 59 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 St Louis 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 St Louis is around 40 days in advance, so don’t leave your flight to the last minute.

      How to find cheap flights to St Louis from Phoenix

      Looking for cheap tickets from Phoenix to St Louis? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

      • Simply hit 'search'. From British Airways to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from Phoenix to St Louis. And with us there are no hidden fees - what you see is what you pay.
      • Compare flight deals to St Louis from Phoenix from over 1,000 providers. Then choose the cheapest or fastest plane tickets.
      • Flex your dates to find the best Phoenix-St Louis ticket prices. If you are flexible when it comes to your travel dates, use Skyscanner's 'Whole month' tool to find the cheapest month, and even day to fly to St Louis from Phoenix.
      • Set up a Price Alert. You can easily track the fare of your cheap Phoenix-St Louis flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
      • Fly without stops. Only interested in direct flights between Phoenix and St Louis? Make sure to tick 'Direct flights only' when performing a search. If there are direct flights available on the route, these will appear in the results.
      • Find the cheapest Business class flights from Phoenix and St Louis. We scour the internet for the best Business, Premium Economy and First Class flight fares to St Louis, too. Check the difference in price as you search – you might just chance upon a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
      • Include nearby airports in your search. Widen your search for Phoenix to St Louis flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save next time you travel.
      • Combine your flight to St Louis from Phoenix with hotels and car hire

        Once you've secured your cheap flight ticket from Phoenix to St Louis, discover the best prices and exclusive rates for hotels in St Louis or nearby. You can also compare hundreds of car hire companies in one go so that you get the best car hire price for your trip.


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