Cheap flights from St. Louis to Phoenix (STL - PHX)

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The best prices from Lambert-St Louis to Phoenix are usually found in August or July, booked 0 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

How to find the cheapest flight from
St. Louis (STL) to Phoenix (PHX)

All the information you need to plan the best STL to PHX flight in 2022: compare St. Louis to Phoenix flight prices with the expected peak season, weather and rainfall in Phoenix.
STL - PHX
Price
$204 - $392
PHX
Temperature
55.4 - 95 °F
PHX
Rainfall
0 - 1.1 inches

Popular in

March

High demand for flights, 21% potential price rise

Cheapest in

August

Best time to find cheap flights, 34% potential price drop

Round-trip from

$204

From Lambert-St Louis to Phoenix

One-way from

$174

One-way flight from Lambert-St Louis to Phoenix

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from St. Louis to Phoenix?

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 14% on the overall cost on flights from St. Louis to Phoenix.

When is the cheapest time to fly from St. Louis to Phoenix (STL - PHX)?

When flying from St. Louis to Phoenix, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 38% versus a flight at noon.

What is the cheapest month to fly from St. Louis to Phoenix?

The best pricing can be found in the month of August. Prices to Phoenix from St. Louis average $308. You can even find prices in August for less than $308, as users have found deals to Phoenix from as low as $108. The month of March appears to be one of the more expensive times to travel to Phoenix from St. Louis. Flying in the targeted month can save you up to 27%.

Cheap flights from St. Louis to Phoenix in May, June 2022

The best prices found for STL to PHX flights for May, June
25 May - 1 Jun
$229pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
3 Jun - 8 Jun
$237pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
28 Jun - 5 Jul
$250pp
STL
Lambert-St Louis
Frontier
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Frontier
 
1 STOP
STL
Lambert-St Louis

Lambert-St Louis to Phoenix 2022 flight deals

Cheap flights to Phoenix from St. Louis found for this year
3 Aug - 9 Aug
$214pp
STL
Lambert-St Louis
Frontier
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
26 Jul - 2 Aug
$216pp
STL
Lambert-St Louis
Frontier
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
2 Aug - 16 Aug
$224pp
STL
Lambert-St Louis
Frontier
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Frontier
 
1 STOP
STL
Lambert-St Louis

Non-stop flights to Phoenix from St. Louis

Save time with St. Louis to Phoenix direct flight deals
16 Aug - 22 Aug
$368pp
STL
Lambert-St Louis
American Airlines
Non-Stop
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
25 Aug - 28 Aug
$376pp
STL
Lambert-St Louis
American Airlines
Non-Stop
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
22 Oct - 24 Oct
$388pp
STL
Lambert-St Louis
American Airlines
Non-Stop
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
American Airlines
Non-Stop
STL
Lambert-St Louis

Last minute flights from St. Louis to Phoenix

Late deals on round-trip flights to Phoenix from St. Louis, departing today and this week
3 Jun - 8 Jun
$237pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
31 May - 2 Jun
$251pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
2 Jun - 6 Jun
$277pp
STL
Lambert-St Louis
Frontier
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Frontier
 
1 STOP
STL
Lambert-St Louis

One-way flights to Phoenix from St. Louis

The cheapest one-way flights from St. Louis to Phoenix
5:20 pm - 3:14 am
Multiple Airlines
1 Stop
11h 54m
STL - PHX
Multiple Airlines
$174
Kiwi.com
3:09 am - 12:25 pm
Frontier
1 Stop
11h 16m
STL - PHX
Frontier
$176
Kiwi.com
5:04 pm - 7:39 am
Spirit Airlines
2 Stops
16h 35m
STL - PHX
Spirit Airlines
$178
Gotogate

Related info for your journey

Useful info, stats and facts about <span class="emphasized">St. Louis</span> to <span class="emphasized">Phoenix</span> flights.

Flight FAQs

From St. Louis to Phoenix

What airport do you fly from for flights from St. Louis to Phoenix?

Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Phoenix from St. Louis. Booking flights from Lambert-St Louis (STL) to Phoenix should be relatively easy as there are 7 daily outbound flights to Phoenix from 8 different airlines.

Which airlines flying from Lambert-St Louis to Phoenix have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Lambert-St Louis to Phoenix that may be offering flexible cancellation policies are American Airlines, Spirit Airlines, and Frontier. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from St. Louis to Phoenix for under $300 on Cheapflights?

Yes, there are multiple flights from St. Louis to Phoenix for under $300. The cheapest flight booked recently is on Frontier for just $214, but on average you can expect to pay $255.

Are there nonstop flights from St. Louis to Phoenix for under $400 on Cheapflights?

Cheapflights has at least 20 direct flights from St. Louis to Phoenix under $400. A good price for a nonstop flight from St. Louis to Phoenix is less than $432.

Are there last-minute flights available from St. Louis to Phoenix for under $300?

There are currently 20+ open flights from St. Louis to Phoenix within the next 7 days for less than $300.

What days are nonstop flights available from St. Louis to Phoenix?

Nonstop flights are available for this route on the following days: Friday.

How popular is this St. Louis to Phoenix flight route?

This flight path from Lambert-St Louis to Phoenix was viewed by 123 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How many flights depart from St. Louis to Phoenix on average per day?

1 flight departure from St. Louis to Phoenix per day on average.
Afternoon (Noon - 6pm) - 100% of flight departures

How long is the flight from St. Louis to Phoenix?

Airlines like Frontier and Spirit Airlines fly from St. Louis to Phoenix in about 11h 19m. The time it takes to get you to your destination can typically vary by up to 11h 01m. The distance from St. Louis to Phoenix is about 1266 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from St. Louis to Phoenix round-trip?

Currently priced at $214, Frontier will fly you from St. Louis to Phoenix and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Spirit Airlines for as low as $282. These flights start at 30% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from St. Louis to Phoenix one-way?

For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $105. Users have also found prices from $126 and $193 on Frontier and American Airlines, respectively.

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

While on average a flight from St. Louis to Phoenix is generally $633, our data shows the cheapest flight currently is $22. When looking at the most popular route, (Lambert-St Louis - Phoenix Sky Harbor Intl), you can expect to pay $237 for that flight.

What are the most popular airlines that fly from St. Louis to Phoenix?

When booking a flight from St. Louis to Phoenix, you may want to consider flying on American Airlines, Delta or Frontier as they are the most popular for this route.

What are the most reliable airlines from St. Louis to Phoenix?

No one likes to see their flight delayed. When booking a flight from St. Louis to Phoenix consider choosing American Airlines (87%), Alaska Airlines (87%) or Spirit Airlines (74%) as they are the most reliable in getting you off to your destination on time.

COVID Restrictions

View COVID Travel Restrictions for Phoenix, AZ

Do I need a COVID test to fly to Phoenix from St. Louis?

Information is based on travel restrictions for travel to Phoenix within the United States

Most visitors from Lambert-St Louis need to provide a negative COVID-19 test result and/or quarantine to enter Phoenix.

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Phoenix.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Phoenix.

Do I need a test to fly back to St. Louis from Phoenix?

Returning to Lambert-St Louis from Phoenix

COVID-19 testing requirements
Visitors from Phoenix must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Lambert-St Louis.

Quarantine requirements
Visitors from Phoenix are not required to quarantine after entering Lambert-St Louis.

Hide COVID Travel Restrictions for Phoenix, AZ

Alternative routes for St. Louis to Phoenix

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Phoenix

Things to know before you go - useful duration and weather info for your trip from St. Louis to Phoenix.
Average temperature for May in Phoenix
96.8 °F
Avg rainfall for May in Phoenix
0.2 ″

Airports servicing St. Louis

Airports servicing Phoenix

Phoenix-Mesa Gateway (AZA)

Top 6 airlines flying from Lambert-St Louis to Phoenix

The chart below displays the airlines Cheapflights users traveling from St. Louis to Phoenix choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Juneyao Airlines
$9 $18 No cancel fee 66%

We couldn't confirm the COVID-19 safety measures taken by Juneyao Airlines. Please check directly on their website for additional information.

Spirit Airlines
$60 $183 No cancel fee 65%
Frontier
$84 $217 No cancel fee 62%
Delta
$122 $219 No cancel fee N/A
United Airlines
$169 $398 No cancel fee 69%
American Airlines
$179 $387 No cancel fee 71%

Hourly flight availability from St. Louis to Phoenix

See what time of day planes typically take off from St. Louis towards Phoenix.
Afternoon Noon to 6 PM 50% of STL to PHX departures
Morning 6 AM to noon 38% of STL to PHX departures
Evening 6 PM to midnight 11% of STL to PHX departures
Early morning Midnight to 6 AM 1% of STL to PHX departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from St. Louis to Phoenix
See how many times per day planes take to the skies headed from St. Louis to Phoenix.
Sunday
8 daily flights
Monday
8 daily flights
Tuesday
8 daily flights
Wednesday
8 daily flights
Thursday
8 daily flights
Friday
8 daily flights
Saturday
4 daily flights
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