Cheap Flight Tickets from Phoenix (PHX) to St Louis (STL), Starting at $171

Good to Know: Cheapest and Fastest PHX - STL Flights

Useful information for finding best airline tickets from Phoenix Sky Harbor International to Lambert St Louis International on your next trip.

Cheapest Round Trip Flight

$429

DL Delta Airlines • 1 stop • 8h 51m

Aug 10 – Aug 17

The cheapest round trip flight from Phoenix to St Louis (PHX-STL-PHX) is currently $429

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Cheapest One way Flight

$171

WN Southwest Airlines • 1 stop • 20h 20m

Jul 31

The cheapest one way flight from Phoenix to St Louis (PHX-STL) is currently $171

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Cheapest Direct Flight

$278

WN Southwest Airlines • nonstop • 4h 10m

Oct 13

The cheapest nonstop flight from Phoenix to St Louis (PHX-STL) is currently $278

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Fastest Flight

4h 10m

The fastest nonstop flight from Phoenix to St Louis (PHX-STL) takes 4h 10m

Top Airlines Flying from Phoenix to St Louis

Southwest Airlines-WN

Southwest Airlines

Delta Airline, DL

Delta Airlines

Latest Flight Deals from Phoenix (PHX) to St Louis (STL)

Compare and book low fare round-trip air tickets from Phoenix to St Louis. Ideal for travelers with confirmed return itineraries.

Aug 10 - Aug 17, Economy
DL
Phoenix → St Louis
8h 51m
5:10 PM - 12:41 AM • 1 stop
DL
Phoenix → St Louis
9h 9m
8:48 AM - 12:37 PM • 1 stop
$429
Delta Airlines
Aug 10 - Aug 17, Economy
DL
Phoenix → St Louis
9h 18m
7:12 AM - 3:10 PM • 1 stop
DL
Phoenix → St Louis
8h 55m
2:32 PM - 6:07 PM • 1 stop
$429
Delta Airlines
Aug 10 - Aug 17, Economy
WN
Phoenix → St Louis
4h 10m
1:30 PM - 6:20 PM • nonstop
WN
Phoenix → St Louis
5h 10m
11:50 AM - 1:00 PM • nonstop
$641
Southwest Airlines
Aug 10 - Aug 17, Economy
WN
Phoenix → St Louis
13h 50m
9:15 AM - 7:45 PM • 1 stop
WN
Phoenix → St Louis
7h 10m
2:20 PM - 4:50 PM • 1 stop
$656
Southwest Airlines
Aug 10 - Aug 17, Economy
WN
Phoenix → St Louis
13h 30m
7:55 AM - 6:05 PM • 1 stop
WN
Phoenix → St Louis
7h 10m
2:20 PM - 4:50 PM • 1 stop
$656
Southwest Airlines
Aug 10 - Aug 17, Economy
WN
Phoenix → St Louis
10h 20m
1:45 PM - 10:05 PM • 1 stop
WN
Phoenix → St Louis
7h 10m
2:20 PM - 4:50 PM • 1 stop
$656
Southwest Airlines

Fly from Phoenix to St Louis with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Phoenix to St Louis? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Phoenix to St Louis Flights

What are the airports in Phoenix?
PHX
What’s the most popular airline flying from PHX to STL?
The most popular airline flying from Phoenix to St Louis are
Can I fly from PHX to STL non-stop?
Yes, you can fly PHX to STL non-stop on
Which airlines fly nonstop between Phoenix and St Louis?
The non-stop flights between Phoenix and St Louis are .
What’s the earliest departure time from PHX to STL Airport?
The earliest flight leaves PHX at 5:00 am and lands in STL - Lambert St Louis International
What are the airports in St Louis?
STL
Can I make changes to my Phoenix to St Louis flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from PHX to STL?
Read the fare rules of the Phoenix to St Louis air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Phoenix and St Louis?
operate flights between Phoenix and St Louis
How long does a flight from Phoenix to St Louis take?
It takes approximately 3 hour to fly non-stop from PHX to STL, which is 1261.81 miles by air.
Which airlines provide the cheapest flights from Phoenix (PHX) to St Louis (STL) ?
In the past couple of days, the cheapest tickets to STL from PHX were found on WN : USD 171
Do I need a passport to fly between PHX and STL?
No
What’s the latest departure time from PHX to STL ?
The last flight leaves PHX at 7:15 pm

Essential Information for Booking Flights from Phoenix (PHX) - AI Insights

What's the cheapest airline from phx to stl?
You can find budget-friendly flights from Phoenix Sky Harbor International Airport (phx) to Lambert St Louis International Airport (stl) on Southwest Airlines (WN). The airline offers affordable fares, making it a great option for travelers. Low Fares and Savings are available when booking in advance, so consider making your trip 9 days prior to departure for the best deals.
What's the popular airline to fly from phx to stl?
Southwest Airlines offers flights from Phoenix Sky Harbor International Airport (phx) to Lambert St Louis International Airport (stl) with a one-stop journey. As you're booking in advance, 9 days prior to your trip, you can expect competitive airfares on this route. For budget-friendly options, consider Southwest Airlines for your round-trip flights.
What's the cheapest day of the week to fly from phx to stl?
The cheapest day to fly from Phoenix Sky Harbor International Airport (phx) to Lambert St Louis International Airport (stl) is Saturday. Flying on this day can result in budget-friendly flights, making it an ideal option for travelers looking for affordable airfares. Low fares are often available during the off-peak season, which includes weekends like Saturdays.
What's the cheapest month to fly from phx to stl?
The cheapest month to fly from Phoenix Sky Harbor International Airport (phx) to Lambert St Louis International Airport (stl) is July. You can find budget-friendly flights during this time. Consider booking your round trip airfare in advance, ideally 9 days prior to your departure date.
Which airline/airlines fly from phx to stl?
The airlines that fly from Phoenix Sky Harbor International Airport (phx) to Lambert St Louis International Airport (stl) include Porter Airline (PD), Mexicana (MX), Alaska Airlines (AS), Aeromexico (AM), Southern Airways (9X), American Airlines (AA), Delta Airlines (DL), Frontier Airlines (F9), Allegiant (G4), and WestJet Airlines (WS). You can find budget-friendly flights with these airlines, including airfares that are often cheaper than usual during advance booking periods. For a round-trip journey, consider booking your flight at least 9 days in advance to secure the best savings.
What is the cheapest airfare from Phoenix Sky Harbor International to Lambert St Louis International?
The cheapest airfare from Phoenix Sky Harbor International to Lambert St Louis International can be found on Southwest Airlines (WN) with a fare of £200 for a one-way ticket.
Can I book flights for 1 person on this trip?
Yes, you can book flights for 1 person on this trip. The airline offers services for solo travelers.
How many advance booking days do I need for this round trip flight?
You need to book your flight at least 9 days in advance for the best prices.
Are there any web-based tools available to compare airfares and find cheap flights?
Yes, FareLeaders offers a user-friendly interface to compare airfares and find affordable flights.
When is the best time to book my airfare for a weekend getaway?
The cheapest day to book your flight is Saturday, with July being the cheapest month.

Phoenix (PHX) to St Louis (STL): Airport Information

Origin Airport Phoenix Sky Harbor International , Phoenix, US
Destination Airport Lambert St Louis International , St Louis, US
Distance 1262 miles

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