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 2021: compare St. Louis to Phoenix flight prices with the expected peak season, weather and rainfall in Phoenix.
STL - PH1
Price
$204 - $392
PH1
Temperature
55.4 - 95 °F
PH1
Precipitation
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

$91

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 month to fly from St. Louis to Phoenix?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, August can be a great choice for travel to Phoenix. Flights to Phoenix from St. Louis in August are about $308 on average during August, but can be found for as low as $108.

What is the cheapest day to fly round-trip from St. Louis to Phoenix?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 14% on your flight compared to booking on days when demand is much higher.

When is the cheapest time to fly from St. Louis to Phoenix (STL - PH1)?

Unlike at noon, when flights are generally more expensive, you can save up to 38% on flights from St. Louis to Phoenix by exploring options for tickets in the evening.

Cheap flights from St. Louis to Phoenix in October, November 2021

The best prices found for STL to PHX flights for October, November
17 Nov - 18 Nov
$67pp
STL
Lambert-St Louis
Spirit Airlines
Non-Stop
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Spirit Airlines
Non-Stop
STL
Lambert-St Louis
13 Nov - 17 Nov
$72pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Spirit Airlines
Non-Stop
STL
Lambert-St Louis
13 Nov - 17 Nov
$84pp
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 2021 flight deals

Cheap flights to Phoenix from St. Louis found for this year
4 Dec - 11 Dec
$58pp
STL
Lambert-St Louis
Spirit Airlines
Non-Stop
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Spirit Airlines
Non-Stop
STL
Lambert-St Louis
17 Nov - 18 Nov
$67pp
STL
Lambert-St Louis
Spirit Airlines
Non-Stop
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Spirit Airlines
Non-Stop
STL
Lambert-St Louis
9 Dec - 11 Dec
$70pp
STL
Lambert-St Louis
Spirit Airlines
Non-Stop
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Spirit Airlines
Non-Stop
STL
Lambert-St Louis

Non-stop flights to Phoenix from St. Louis

Save time with St. Louis to Phoenix direct flight deals
4 Dec - 11 Dec
$58pp
STL
Lambert-St Louis
Spirit Airlines
Non-Stop
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Spirit Airlines
Non-Stop
STL
Lambert-St Louis
19 Jan - 26 Jan
$59pp
STL
Lambert-St Louis
Spirit Airlines
Non-Stop
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Spirit Airlines
Non-Stop
STL
Lambert-St Louis
17 Nov - 18 Nov
$67pp
STL
Lambert-St Louis
Spirit Airlines
Non-Stop
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Spirit 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
6 Nov - 9 Nov
$104pp
STL
Lambert-St Louis
Frontier
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
3 Nov - 9 Nov
$108pp
STL
Lambert-St Louis
Frontier
 
1 STOP
PHX
Phoenix Sky Harbor Intl
PHX
Phoenix Sky Harbor Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
3 Nov - 10 Nov
$110pp
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
10:22 am - 7:36 pm
Frontier
1 Stop
10h 14m
STL - PHX
Frontier
$91
Kiwi.com
10:30 am - 3:15 am
Multiple Airlines
1 Stop
18h 45m
STL - PHX
Multiple Airlines
$92
Kiwi.com
10:57 am - 1:10 pm
Spirit Airlines
2 Stops
28h 13m
STL - PHX
Spirit Airlines
$100
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, Frontier, and United Airlines. 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 $100 on Cheapflights?

Yes, there are multiple flights from St. Louis to Phoenix for under $100. The cheapest flight booked recently is on Spirit Airlines for just $58, but on average you can expect to pay $79.

Are there nonstop flights from St. Louis to Phoenix for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from St. Louis to Phoenix under $100. A good price for a nonstop flight from St. Louis to Phoenix is less than $100.

Are there last-minute flights available from St. Louis to Phoenix for under $200?

There are currently 20+ open flights from St. Louis to Phoenix within the next 7 days for less than $200.

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

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

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?

5 flight departures from St. Louis to Phoenix per day on average.
Morning (6am - Noon) - 40% of flight departures
Afternoon (Noon - 6pm) - 40% of flight departures
Evening (6pm - Midnight) - 20% of flight departures

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

Airlines like Spirit Airlines and Frontier fly from St. Louis to Phoenix in about 3h 25m. The time it takes to get you to your destination can typically vary by up to 2h 28m. 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 $58, Spirit Airlines will fly you from St. Louis to Phoenix and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Frontier for as low as $88. These flights start at 81% lower than the current average price 3 months from now.

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 Major Airline, American Airlines or Delta as they are the most popular for this route.

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

While on average a flight from St. Louis to Phoenix is generally $551, our data shows the cheapest flight currently is $103. When looking at the most popular route, (Lambert-St Louis - Phoenix Sky Harbor Intl), you can expect to pay $59 for that flight.

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 (95%), Alaska Airlines (95%) or Southwest (71%) 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 72 hours 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 72 hours 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.
Flight duration from STL to Phoenix
3h 11m
Average temperature for October in Phoenix
91.4 °F
Avg rainfall for October in Phoenix
0.6 ″

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
United Airlines
$61 $276 No cancel fee 69%
Allegiant Air
$94 $189 No cancel fee 88%
Frontier
$103 $238 No cancel fee 62%
Sun Country Air
$116 $263 No cancel fee 83%
Delta
$162 $305 No cancel fee N/A
American Airlines
$175 $361 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 52% of STL to PHX departures
Early morning Midnight to 6 AM 41% of STL to PHX departures
Morning 6 AM to noon 7% of STL to PHX departures
Evening 6 PM to midnight 0% 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
4 daily flights
Monday
10 daily flights
Tuesday
10 daily flights
Wednesday
10 daily flights
Thursday
8 daily flights
Friday
10 daily flights
Saturday
2 daily flights
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