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Cheap flights from St. Louis to Phoenix Sky Harbor Intl Airport from $54

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Phoenix Sky Harbor Intl Airport departing on 1/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Phoenix

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Phoenix that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Phoenix.

Cheap last minute flights

Planning a quick getaway from St. Louis to Phoenix? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Phoenix, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from St. Louis to Phoenix

Find recent round-trip train or bus tickets from St. Louis to Phoenix.

All round-trip flight deals to Phoenix

The cheapest plane tickets to Phoenix found on KAYAK recently.
7:09 pm - 12:26 amSTL-PHX
6h 17m1 stop
9:22 am - 7:31 pmPHX-STL
9h 09m1 stop
$108Frontier
Find Deal
Mon, Jan 27 - Thu, Jan 30
6:46 pm - 12:20 amSTL-PHX
6h 34m1 stop
6:00 am - 9:06 amPHX-STL
26h 06m1 stop
$118Frontier
Find Deal
Sat, Jan 11 - Tue, Jan 14
7:15 am - 9:54 amSTL-PHX
3h 39mnonstop
9:30 am - 1:42 pmPHX-STL
3h 12mnonstop
$277American Airlines
Find Deal
Tue, Jan 7 - Wed, Jan 8
5:00 pm - 12:46 amSTL-PHX
8h 46m1 stop
6:30 am - 1:18 pmPHX-STL
5h 48m1 stop
$296Delta
Find Deal
Tue, Jan 7 - Wed, Jan 8
7:30 am - 10:10 amSTL-PHX
3h 40mnonstop
6:35 pm - 10:25 pmPHX-STL
2h 50mnonstop
$299Southwest
Find Deal
Sat, Jan 11 - Wed, Jan 15
5:12 pm - 11:34 pmSTL-PHX
7h 22m1 stop
9:30 am - 1:42 pmPHX-STL
3h 12mnonstop
$308American Airlines
Find Deal
Sat, Jan 11 - Tue, Jan 14
7:00 am - 2:08 pmSTL-PHX
8h 08m1 stop
8:00 am - 3:38 pmPHX-STL
6h 38m1 stop
$313United Airlines
Find Deal
Sat, Jan 11 - Wed, Jan 15
8:25 pm - 11:00 pmSTL-PHX
3h 35mnonstop
6:05 am - 9:50 amPHX-STL
2h 45mnonstop
$320Southwest
Find Deal
Wed, Feb 12 - Tue, Feb 18
7:00 am - 2:08 pmSTL-PHX
8h 08m1 stop
7:00 am - 12:48 pmPHX-STL
4h 48m1 stop
$334United Airlines
Find Deal
Tue, Jan 14 - Thu, Jan 23
6:59 pm - 12:46 amSTL-PHX
6h 47m1 stop
3:15 pm - 11:14 pmPHX-STL
6h 59m1 stop
$338Delta
Find Deal
Thu, Jan 23 - Mon, Jan 27
7:09 pm - 12:26 amSTL-PHX
6h 17m1 stop
$54Frontier
Find Deal
Sat, Jan 18
11:08 pm - 7:47 amSTL-PHX
9h 39m1 stop
$59Frontier
Find Deal
Thu, Feb 27
7:15 am - 9:59 amSTL-PHX
3h 44mnonstop
$139American Airlines
Find Deal
Tue, Feb 18
12:25 pm - 4:40 pmSTL-PHX
5h 15m1 stop
$144Southwest
Find Deal
Tue, Feb 18
5:00 pm - 12:46 amSTL-PHX
8h 46m1 stop
$148Delta
Find Deal
Wed, Jan 15
5:00 pm - 12:46 amSTL-PHX
8h 46m1 stop
$159Delta
Find Deal
Wed, Jan 15
8:25 pm - 11:00 pmSTL-PHX
3h 35mnonstop
$160Southwest
Find Deal
Sun, Jan 19
2:27 pm - 4:52 pmSTL-PHX
3h 25mnonstop
$164American Airlines
Find Deal
Sat, Jan 18
7:00 am - 2:08 pmSTL-PHX
8h 08m1 stop
$165United Airlines
Find Deal
Thu, Jan 23
7:00 am - 2:08 pmSTL-PHX
8h 08m1 stop
$190United Airlines
Find Deal
Tue, Jan 7
10:09 pm - 7:36 amSTL-PHX
10h 27m1 stop
9:50 pm - 11:10 amPHX-STL
12h 20m1 stop
$362Frontier
Find Deal
Sun, Dec 22 - Sat, Dec 28
10:09 pm - 12:39 amSTL-PHX
27h 30m1 stop
5:45 am - 8:13 amPHX-STL
25h 28m1 stop
$377Frontier
Find Deal
Sun, Dec 22 - Fri, Dec 27
9:00 pm - 11:25 pmSTL-PHX
3h 25mnonstop
7:10 pm - 11:00 pmPHX-STL
2h 50mnonstop
$624Southwest
Find Deal
Sat, Dec 21 - Tue, Dec 31
9:40 am - 1:20 pmSTL-PHX
4h 40m1 stop
7:10 pm - 11:00 pmPHX-STL
2h 50mnonstop
$629Southwest
Find Deal
Sat, Dec 21 - Tue, Dec 31
5:30 pm - 10:50 pmSTL-PHX
6h 20m1 stop
5:10 pm - 11:59 pmPHX-STL
5h 49m1 stop
$678United Airlines
Find Deal
Sun, Dec 22 - Wed, Jan 1
11:30 am - 11:29 pmSTL-PHX
12h 59m2 stops
5:10 pm - 11:59 pmPHX-STL
5h 49m1 stop
$687United Airlines
Find Deal
Sun, Dec 22 - Wed, Jan 1
7:24 am - 9:55 amSTL-PHX
3h 31mnonstop
9:35 am - 1:37 pmPHX-STL
3h 02mnonstop
$703American Airlines
Find Deal
Sun, Dec 22 - Wed, Jan 1
6:40 pm - 12:37 amSTL-PHX
6h 57m1 stop
3:05 pm - 10:06 pmPHX-STL
6h 01m1 stop
$727Delta
Find Deal
Sat, Dec 21 - Wed, Jan 1
2:17 pm - 4:41 pmSTL-PHX
3h 24mnonstop
9:35 am - 1:37 pmPHX-STL
3h 02mnonstop
$750American Airlines
Find Deal
Mon, Dec 23 - Sat, Jan 4
7:10 am - 1:33 pmSTL-PHX
7h 23m1 stop
12:59 am - 11:06 amPHX-STL
9h 07m1 stop
$1,048Delta
Find Deal
Mon, Dec 23 - Mon, Dec 30
7:15 am - 9:54 amSTL-PHX
3h 39mnonstop
9:30 am - 1:42 pmPHX-STL
3h 12mnonstop
$277American Airlines
Find Deal
Tue, Jan 7 - Wed, Jan 8
7:30 am - 10:10 amSTL-PHX
3h 40mnonstop
6:35 pm - 10:25 pmPHX-STL
2h 50mnonstop
$299Southwest
Find Deal
Sat, Jan 11 - Wed, Jan 15
8:25 pm - 11:00 pmSTL-PHX
3h 35mnonstop
6:05 am - 9:50 amPHX-STL
2h 45mnonstop
$320Southwest
Find Deal
Wed, Feb 12 - Tue, Feb 18
2:27 pm - 4:52 pmSTL-PHX
3h 25mnonstop
7:55 pm - 11:59 pmPHX-STL
3h 04mnonstop
$323American Airlines
Find Deal
Mon, Jan 27 - Thu, Jan 30
7:15 am - 9:59 amSTL-PHX
3h 44mnonstop
7:52 pm - 11:39 pmPHX-STL
2h 47mnonstop
$344American Airlines
Find Deal
Sat, Feb 15 - Sat, Feb 22
2:27 pm - 4:52 pmSTL-PHX
3h 25mnonstop
7:58 pm - 11:57 pmPHX-STL
2h 59mnonstop
$352American Airlines
Find Deal
Fri, Jan 17 - Tue, Jan 21
3:15 pm - 5:50 pmSTL-PHX
3h 35mnonstop
6:55 am - 10:45 amPHX-STL
2h 50mnonstop
$353Southwest
Find Deal
Fri, Jan 31 - Tue, Feb 4
2:27 pm - 4:52 pmSTL-PHX
3h 25mnonstop
7:58 pm - 11:57 pmPHX-STL
2h 59mnonstop
$362American Airlines
Find Deal
Wed, Jan 8 - Sat, Jan 11
6:30 am - 9:10 amSTL-PHX
3h 40mnonstop
6:55 am - 10:45 amPHX-STL
2h 50mnonstop
$374Southwest
Find Deal
Wed, Jan 8 - Wed, Jan 22
6:44 am - 9:24 amSTL-PHX
3h 40mnonstop
7:55 pm - 11:59 pmPHX-STL
3h 04mnonstop
$384American Airlines
Find Deal
Thu, Jan 23 - Sun, Jan 26

Frontier flights from St. Louis to Phoenix Sky Harbor Intl Airport

Our best Frontier deals on St. Louis to Phoenix Sky Harbor Intl Airport flight tickets
Frontier
Jan 27
STL7:09 pmLambert-St Louis
6h 17m
1 stop
PHX12:26 amPhoenix Sky Harbor Intl
Jan 30
PHX9:22 amPhoenix Sky Harbor Intl
9h 09m
1 stop
STL7:31 pmLambert-St Louis
Frontier
Jan 11
STL6:46 pmLambert-St Louis
6h 34m
1 stop
PHX12:20 amPhoenix Sky Harbor Intl
Jan 14
PHX6:00 amPhoenix Sky Harbor Intl
26h 06m
1 stop
STL9:06 amLambert-St Louis
Frontier
Feb 21
STL6:59 pmLambert-St Louis
7h 00m
1 stop
PHX12:59 amPhoenix Sky Harbor Intl
Feb 25
PHX8:52 amPhoenix Sky Harbor Intl
7h 44m
1 stop
STL5:36 pmLambert-St Louis

American Airlines flights from St. Louis to Phoenix Sky Harbor Intl Airport

Our best American Airlines deals on St. Louis to Phoenix Sky Harbor Intl Airport flight tickets
American Airlines
Jan 7
STL7:15 amLambert-St Louis
3h 39m
PHX9:54 amPhoenix Sky Harbor Intl
Jan 8
PHX9:30 amPhoenix Sky Harbor Intl
3h 12m
STL1:42 pmLambert-St Louis
American Airlines
Jan 11
STL5:12 pmLambert-St Louis
7h 22m
1 stop
PHX11:34 pmPhoenix Sky Harbor Intl
Jan 14
PHX9:30 amPhoenix Sky Harbor Intl
3h 12m
STL1:42 pmLambert-St Louis
American Airlines
Jan 27
STL2:27 pmLambert-St Louis
3h 25m
PHX4:52 pmPhoenix Sky Harbor Intl
Jan 30
PHX7:55 pmPhoenix Sky Harbor Intl
3h 04m
STL11:59 pmLambert-St Louis

See travel insights to Phoenix from

How to get the cheapest flight ticket from St. Louis to Phoenix Sky Harbor Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Phoenix Sky Harbor Intl Airport?

In general, May is the cheapest month to fly from St. Louis to Phoenix Sky Harbor Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $200. If you are unable to visit Phoenix Sky Harbor Intl Airport during the month of May, then departing from St. Louis during the month July is also very affordable. Most momondo users find prices during this month for around $223.

What is the cheapest day to depart on your flight to Phoenix Sky Harbor Intl Airport?

On average, the least expensive day to fly to Phoenix Sky Harbor Intl Airport from St. Louis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $288. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $401. These prices are subject to change though, so be sure to set up a Price Alert for flights to Phoenix Sky Harbor Intl Airport.

What is the cheapest time of day to depart on your flight to Phoenix Sky Harbor Intl Airport?

In the evening is the cheapest time of day to fly from St. Louis to Phoenix Sky Harbor Intl Airport when you can find flight prices for as low as $185. Flying to Phoenix Sky Harbor Intl Airport in the evening is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $379. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Lambert-St Louis to Phoenix Sky Harbor Intl flight route?

Fly from Lambert-St Louis to Phoenix Sky Harbor Intl for the best Lambert-St Louis - Phoenix Sky Harbor Intl flight prices

How far in advance should I book a flight to Phoenix Sky Harbor Intl Airport?

In general, most travelers find the cheapest time to book a flight to Phoenix Sky Harbor Intl Airport is about 14 days prior to their departure date when tickets on average are $318. However, in the past 72 hours, people saw flights from St. Louis for as low as $202.

What cabin class options are available on Lambert-St Louis to Phoenix Sky Harbor Intl flights?

There are 3 cabin classes available to choose from on Lambert-St Louis to Phoenix Sky Harbor Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Phoenix Sky Harbor Intl Airport flights?

You could potentially save up to 61% on your flight if you consider stops on a St. Louis to Phoenix Sky Harbor Intl Airport flight.

How have St. Louis to Phoenix Sky Harbor Intl Airport flight prices changed over time?

As of December 2024, prices for St. Louis to Phoenix Sky Harbor Intl Airport flights are approximately 0% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Phoenix Sky Harbor Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Phoenix Sky Harbor Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Phoenix Sky Harbor Intl Airport (STL to PHX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Phoenix Sky Harbor Intl Airport

Best Price Found

$54

Fastest flight time

3h 20m

Direct flights

Every day
The best one-way flight to Phoenix Sky Harbor Intl Airport from St. Louis in the past 72 hours is $54. The best round-trip flight deal from St. Louis to Phoenix Sky Harbor Intl Airport found on momondo in the last 72 hours is $108.
The fastest flight from St. Louis to Phoenix Sky Harbor Intl Airport takes 3h 20m
Direct flights go from St. Louis to Phoenix Sky Harbor Intl Airport every day.

  • How far is Lambert-St Louis to Phoenix Sky Harbor Intl by plane?

    Phoenix Sky Harbor Intl is 1265.4 mi away from Lambert-St Louis. Typically, this will take 3h 20m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Phoenix Sky Harbor Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Phoenix Sky Harbor Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Phoenix Sky Harbor Intl Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Phoenix Sky Harbor Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Phoenix Sky Harbor Intl Airport.

  • What documentation or ID do you need to fly to Phoenix Sky Harbor Intl Airport?

    The travel and health documents you'll need for your trip to Phoenix Sky Harbor Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Phoenix Sky Harbor Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to Phoenix Sky Harbor Intl Airport?

  • What is the most popular airline from St. Louis to Phoenix Sky Harbor Intl Airport?


Best airlines flying from St. Louis to Phoenix Sky Harbor Intl Airport

Compare and see reviews for airlines that fly from St. Louis to Phoenix Sky Harbor Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $78Free CancellationRating
6.1
3,478 reviews
Search Frontier flights
American AirlinesPriceFrom $147Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $215Free CancellationRating
8.0
8,600 reviews
Search Delta flights
United AirlinesPriceFrom $226Free CancellationRating
7.4
9,048 reviews
Search United Airlines flights
SouthwestPriceFrom $240Free CancellationRating
8.1
4,836 reviews
Search Southwest flights
  • Southwest Flights From St. Louis to Phoenix Sky Harbor Intl Airport

    Southwest operates around 28 flights from St. Louis to Phoenix Sky Harbor Intl Airport every week. The average price of these flights found in the last 72 hours has been $433, but momondo users have found Southwest deals from St. Louis to Phoenix Sky Harbor Intl Airport from as low as $240 round-trip. Southwest has been scored 8.1/10 in 4,836 reviews.

  • United Airlines Flights From St. Louis to Phoenix Sky Harbor Intl Airport

    United Airlines (7.4/10 from 9,048 reviews) operates around 2 flights from St. Louis to Phoenix Sky Harbor Intl Airport in any given week. The average United Airlines airfare for this route is around $505, with deals from around $226 rare but found on momondo. Referenced prices are for round-trip St. Louis to Phoenix Sky Harbor Intl Airport flight searches in the last 72 hours.


Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Phoenix?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Phoenix. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Phoenix with flexible booking policies on momondo?

momondo does allow users to show only those flights to Phoenix from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Phoenix?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Phoenix from St. Louis.

I’m not ready to book a flight from St. Louis to Phoenix right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Phoenix, momondo offers a useful price alert feature which will track prices for flights to Phoenix from St. Louis and alert you when they change.


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