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$39+ Cheap flights from Missouri to Phoenix

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHX
Jan 31 — Feb 71
Sat 1/31
Sat 2/7
1 adult, Economy
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Cheap flight deals from Missouri to Phoenix

Cheapest flights from Missouri to Phoenix
Explore the most affordable flight options available from Missouri to Phoenix. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 1, 2026.

This American Airlines deal was found by Cheapflights users on 12/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:04 pmSTL - PHX
1 stop7h 30mAmerican Airlines
Thu 1/17:56 pmPHX - STL
Nonstop2h 55mAmerican Airlines
Deal found 12/30$307
This Kiwi.com deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:52 pmSTL - PHX
Nonstop3h 31mFrontier
Fri 1/23:50 pmPHX - STL
Nonstop2h 57mFrontier
Deal found 12/29$336
This American Airlines deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:16 amSTL - PHX
1 stop5h 58mAmerican Airlines
Wed 1/79:54 amPHX - STL
Nonstop2h 59mAmerican Airlines
Deal found 12/29$347
This United Airlines deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:02 pmSTL - PHX
1 stop6h 56mUnited Airlines
Wed 1/710:40 amPHX - STL
1 stop5h 15mUnited Airlines
Deal found 12/29$357
This American Airlines deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:16 amSTL - PHX
1 stop8h 03mAmerican Airlines
Fri 1/27:56 pmPHX - STL
Nonstop2h 55mAmerican Airlines
Deal found 12/29$372
This United Airlines deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:02 pmSTL - PHX
1 stop6h 56mUnited Airlines
Fri 1/23:30 pmPHX - STL
1 stop6h 13mUnited Airlines
Deal found 12/29$382
This American Airlines deal was found by Cheapflights users on 12/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:53 pmSTL - PHX
1 stop7h 55mAmerican Airlines
Sun 1/47:56 pmPHX - STL
Nonstop2h 55mAmerican Airlines
Deal found 12/30$395
This American Airlines deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:53 pmSTL - PHX
1 stop7h 55mAmerican Airlines
Sat 1/35:00 amPHX - STL
1 stop4h 50mAmerican Airlines
Deal found 12/29$397
This United Airlines deal was found by Cheapflights users on 12/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:34 pmCOU - PHX
1 stop6h 43mUnited Airlines
Mon 1/512:59 pmPHX - COU
1 stop6h 29mUnited Airlines
Deal found 12/28$398
This American Airlines deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:43 pmSTL - PHX
Nonstop3h 22mAmerican Airlines
Mon 1/57:56 pmPHX - STL
Nonstop2h 55mAmerican Airlines
Deal found 12/29$402
This United Airlines deal was found by Cheapflights users on 12/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:05 amSTL - PHX
2 stops13h 23mUnited Airlines
Thu 1/17:15 amPHX - STL
2 stops13h 28mUnited Airlines
Deal found 12/30$407
This United Airlines deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:34 pmCOU - PHX
1 stop6h 43mUnited Airlines
Fri 1/28:20 amPHX - COU
1 stop8h 05mUnited Airlines
Deal found 12/29$408

Find flight deals from Missouri to Phoenix

Keep the following information in mind while searching for Missouri to Phoenix flight deals. Data was last updated January 1, 2026.

Round-trip from

$120
(Kiwi.com)

One-way from

$39
(Kiwi.com)

Popular in

March

Cheapest in

November

Average price

$359
From Missouri to Phoenix
Search Deals
One-way flight from Missouri to Phoenix
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri to Phoenix that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 1, 2026.
Use the filters below to find and compare flights from Missouri to Phoenix that are best for you.

Fly from

Missouri

Fly to

Phoenix

Route

Depart

Return

Price

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sat 1/31

5:50 pm-8:20 pm

Nonstop3h 30m

Phoenix Sky Harbor Intl

Sat 2/7

5:00 pm-8:50 pm

Nonstop2h 50m

$244

Cape GirardeauPhoenix

CGI - PHX

CGIPHX

Cape Girardeau

Wed 1/14

3:30 pm-8:20 am

2 stops17h 50m

Phoenix Sky Harbor Intl

Sun 1/18

5:40 am-8:35 pm

1 stop13h 55m

$259

SpringfieldPhoenix

SGF - PHX

SGFPHX

Springfield-Branson

Wed 1/28

1:28 pm-6:06 pm

1 stop5h 38m

Phoenix Sky Harbor Intl

Mon 2/2

3:35 pm-9:44 pm

1 stop5h 09m

$265

SpringfieldPhoenix

SGF - PHX

SGFPHX

Springfield-Branson

Thu 2/26

5:02 pm-10:50 pm

1 stop6h 48m

Phoenix Sky Harbor Intl

Tue 3/3

12:58 pm-8:21 pm

1 stop6h 23m

$265

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sat 2/7

5:50 pm-8:20 pm

Nonstop3h 30m

Phoenix Sky Harbor Intl

Tue 2/10

6:30 pm-10:20 pm

Nonstop2h 50m

$297

ColumbiaPhoenix

COU - PHX

COUPHX

Columbia Regional

Fri 4/24

3:23 pm-10:15 pm

1 stop8h 52m

Phoenix Sky Harbor Intl

Tue 4/28

12:00 pm-9:03 pm

1 stop7h 03m

$298

Kansas CityPhoenix

MCI - PHX

MCIPHX

Kansas City

Wed 3/11

7:08 am-11:29 am

1 stop6h 21m

Phoenix Sky Harbor Intl

Tue 3/17

6:00 am-1:38 pm

1 stop5h 38m

$299

Kansas CityPhoenix

MCI - PHX

MCIPHX

Kansas City

Wed 3/18

8:11 pm-11:39 pm

1 stop5h 28m

Phoenix Sky Harbor Intl

Tue 3/24

5:18 pm-12:46 am

1 stop5h 28m

$299

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Wed 4/8

5:30 am-6:55 am

Nonstop3h 25m

Phoenix Sky Harbor Intl

Sat 4/11

6:40 am-11:30 am

Nonstop2h 50m

$303

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Wed 2/4

5:55 am-8:35 am

Nonstop3h 40m

Phoenix Sky Harbor Intl

Wed 2/11

12:05 pm-5:10 pm

1 stop4h 05m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/29

Showing 1-10 of 58 results
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Best time to book a flight from Missouri to Phoenix

Have a flexible travel schedule? Discover the best time to fly to Phoenix from Missouri with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Missouri to Phoenix

What is the cheapest month to book a flight from Missouri to Phoenix?

Currently, December is the cheapest month in which you can book a flight from Missouri to Phoenix (average of $99). Flying from Missouri to Phoenix in March is currently the most expensive (average of $178). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from MO to PHX?

Find hourly flight availability from Missouri to Phoenix. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 1, 2026.

When flying from Missouri 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 10% versus a flight in the morning.

What is the cheapest day to fly from Missouri to Phoenix?

Use this chart to determine the cheapest time to fly round-trip from Missouri to Phoenix. Price data was last updated on December 27, 2025.

Travelers seeking maximum savings on their Missouri to Phoenix flight should consider departing on Saturday at noon when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Missouri to Phoenix. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Missouri to Phoenix?

    Southwest, United Airlines, and Delta can get you from Missouri to Phoenix in just under 3h 30m. Your travel time can differ by up to 2h 51m. Airlines will cover a distance of 1258 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Missouri to Phoenix one-way?

    The cheapest airlines for a one-way flight from Missouri to Phoenix are Frontier ($50), Allegiant Air ($73), and Southwest ($107).

  • What are the most popular routes from Missouri to Phoenix?

    Most travelers choose Kansas City - Phoenix Sky Harbor Intl, Lambert-St Louis - Phoenix Sky Harbor Intl or Springfield-Branson - Phoenix Sky Harbor Intl when deciding on the best route from Missouri to Phoenix.

  • What are the most reliable airlines from Missouri to Phoenix?

    No one likes to see their flight delayed. When booking a flight from Missouri to Phoenix consider choosing Frontier (88%), American Airlines (79%) or Alaska Airlines (79%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Missouri to Phoenix?

    While on average a flight from Missouri to Phoenix is generally $891, our data shows the cheapest flight currently is $81. When looking at the most popular route, (Kansas City - Phoenix Sky Harbor Intl), you can expect to pay $142 for that flight.

  • Can I find deals for flights from Missouri to Phoenix that include hotel bookings?

    Yes. In addition to deals on Missouri to Phoenix flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Missouri to Phoenix?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Missouri to Phoenix.

  • Can I find deals for business class flights from Missouri to Phoenix?

    Yes. Cheapflights offers flight deals from Missouri to Phoenix by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Missouri to Phoenix?

    Currently, December is the cheapest month in which you can book a flight from Missouri to Phoenix (average of $99). Flying from Missouri to Phoenix in March is currently the most expensive (average of $178). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Missouri to Phoenix

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Top 7 airlines flying from Missouri to Phoenix

Discover the top 7 airlines that operate flights from Missouri to Phoenix. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$92Average$198FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$140Average$194FlexibilityNo cancel feeOn-time88%
Spirit AirlinesCheapest$158Average$200FlexibilityNo cancel feeOn-time65%
DeltaCheapest$168Average$344FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$203Average$388FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$209Average$423FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$210Average$407FlexibilityNo cancel feeOn-time69%

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