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$51+ 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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHX
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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Cheap 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 8, 2026.

Round-trip from

$123
(Kiwi.com)

One-way from

$51
(Kiwi.com)

Popular in

March

Cheapest in

November

Average price

$359
From Missouri to Phoenix
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One-way flight from Missouri to Phoenix
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Highest demand for flights based on searches. 9% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find 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 8, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/7. 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.
Thu 3/56:54 pmMCI - PHX
Nonstop3h 15mFrontier
Mon 3/96:50 amPHX - MCI
1 stop11h 05mFrontier
Deal found 1/7$123
This Super.com deal was found by Cheapflights users on 1/7. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/238:33 pmMCI - PHX
1 stop5h 08mFrontier
Thu 2/262:27 pmPHX - MCI
Nonstop2h 32mFrontier
Deal found 1/7$124
This Frontier deal was found by Cheapflights users on 1/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/184:39 pmMCI - PHX
1 stop8h 20mFrontier
Wed 2/259:52 amPHX - MCI
1 stop4h 52mFrontier
Deal found 1/7$128
This CheapOair deal was found by Cheapflights users on 1/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/218:36 pmMCI - PHX
1 stop12h 36mFrontier
Tue 2/2412:17 pmPHX - MCI
1 stop26h 27mFrontier
Deal found 1/6$129
This Kiwi.com deal was found by Cheapflights users on 1/6. 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.
Sun 2/151:44 pmMCI - PHX
1 stop19h 28mFrontier
Thu 2/191:22 pmPHX - MCI
1 stop5h 11mFrontier
Deal found 1/6$130
This Kiwi.com deal was found by Cheapflights users on 1/7. 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 2/28:41 pmMCI - PHX
1 stop17h 59mFrontier
Wed 2/43:55 pmPHX - MCI
1 stop27h 03mFrontier
Deal found 1/7$133
This Kiwi.com deal was found by Cheapflights users on 1/7. 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.
Sat 2/148:36 pmMCI - PHX
1 stop12h 36mFrontier
Sat 2/219:22 amPHX - MCI
1 stop9h 24mFrontier
Deal found 1/7$134
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 3/92:09 pmMCI - PHX
Nonstop3h 18mFrontier
Thu 3/1212:54 pmPHX - MCI
1 stop5h 01mFrontier
Deal found 1/6$135
This CheapOair deal was found by Cheapflights users on 1/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/198:28 pmMCI - PHX
1 stop12h 14mFrontier
Tue 2/246:51 pmPHX - MCI
1 stop19h 53mFrontier
Deal found 1/7$137
This Frontier deal was found by Cheapflights users on 1/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/209:02 pmSTL - PHX
Nonstop3h 41mFrontier
Fri 2/274:14 pmPHX - STL
Nonstop2h 53mFrontier
Deal found 1/6$178
This Kiwi.com deal was found by Cheapflights users on 1/6. 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.
Sat 2/212:51 pmSTL - PHX
1 stop7h 50mFrontier
Thu 3/56:00 amPHX - STL
2 stops14h 26mFrontier
Deal found 1/6$179
This Frontier deal was found by Cheapflights users on 1/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/2910:01 pmSTL - PHX
1 stop11h 19mFrontier
Mon 2/22:34 pmPHX - STL
1 stop5h 16mFrontier
Deal found 1/6$180

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 8, 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

Tue 4/14

6:30 pm-10:25 pm

1 stop5h 55m

Phoenix Sky Harbor Intl

Tue 5/5

8:55 am-1:50 pm

Nonstop2h 55m

$227

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Mon 2/23

7:00 am-10:56 am

1 stop28h 56m

Phoenix Sky Harbor Intl

Tue 3/3

7:00 am-1:51 pm

1 stop29h 51m

$234

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 2/24

7:00 am-10:55 pm

1 stop16h 55m

Phoenix Sky Harbor Intl

Fri 2/27

7:00 am-1:51 pm

1 stop29h 51m

$240

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 2/24

7:00 am-9:51 am

1 stop27h 51m

Phoenix Sky Harbor Intl

Thu 2/26

10:51 am-1:51 pm

1 stop26h 00m

$247

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sun 2/22

7:00 am-11:59 pm

1 stop17h 59m

Phoenix Sky Harbor Intl

Tue 3/3

8:56 pm-1:51 pm

1 stop15h 55m

$247

Kansas CityPhoenix

MCI - PHX

MCIPHX

Kansas City

Wed 5/6

7:25 am-10:35 am

1 stop5h 10m

Phoenix Sky Harbor Intl

Tue 5/12

1:00 pm-5:30 pm

Nonstop2h 30m

$251

Kansas CityPhoenix

MCI - PHX

MCIPHX

Kansas City

Tue 3/10

5:10 pm-6:10 pm

Nonstop3h 00m

Phoenix Sky Harbor Intl

Tue 3/17

5:30 am-1:05 pm

1 stop5h 35m

$255

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Thu 4/30

9:40 pm-11:05 pm

Nonstop3h 25m

Phoenix Sky Harbor Intl

Wed 5/6

6:20 pm-11:15 pm

Nonstop2h 55m

$262

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 2/24

12:55 pm-3:25 pm

Nonstop3h 30m

Phoenix Sky Harbor Intl

Sat 2/28

12:35 pm-6:00 pm

1 stop4h 25m

$263

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Thu 4/30

4:46 pm-11:59 pm

1 stop9h 13m

Phoenix Sky Harbor Intl

Wed 5/6

7:59 pm-3:50 pm

1 stop17h 51m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 60 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 $98). Flying from Missouri to Phoenix in March is currently the most expensive (average of $175). 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 8, 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 11% 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 January 3, 2026.

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.

Weekly flight availability from Missouri to Phoenix

Explore weekly flight availability from Missouri to Phoenix. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 8, 2026.

The most flights from USMO to PH1 are scheduled on a Monday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

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, Alaska Airlines, and United Airlines can get you from Missouri to Phoenix in just under 5h 19m. Your travel time can differ by up to 23h 37m. Airlines will cover a distance of 1079 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 ($48), 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 (84%) or Alaska Airlines (84%) 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 $892, 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 $141 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 $98). Flying from Missouri to Phoenix in March is currently the most expensive (average of $175). 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$89Average$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$202Average$389FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$206Average$426FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$210Average$407FlexibilityNo cancel feeOn-time69%

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