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Sky Harbor Intl

$60+ Cheap flights from Missouri to Sky Harbor Intl (PHX)

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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHX
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Missouri to Sky Harbor Intl

Keep the following information in mind while searching for Missouri to Sky Harbor Intl flight deals. Data was last updated September 11, 2025.

Round-trip from

$156
(Booking.com)

One-way from

$60
(Cheapflightsfares)

Popular in

March

Cheapest in

August

Average price

$307

Good round-trip deal

$264 or less

Good one-way deal

$149 or less
From Missouri to Phoenix Sky Harbor Intl
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One-way flight from Missouri to Phoenix Sky Harbor Intl
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Highest demand for flights based on searches. 11% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Missouri to Phoenix Sky Harbor Intl.
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Price to beat on a one-way flight from Missouri to Phoenix Sky Harbor Intl.
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Find flight deals from Missouri to Sky Harbor Intl

Cheapest flights from Missouri to Sky Harbor Intl
Explore the most affordable flight options available from Missouri to Sky Harbor Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Booking.com deal was found by Cheapflights users on 9/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/57:55 pmSTL - PHX
1 stop14h 05mFrontier
Fri 10/107:59 pmPHX - STL
1 stop11h 08mFrontier
Deal found 9/8$156
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/306:22 pmSTL - PHX
1 stop6h 18mFrontier
Wed 11/56:11 pmPHX - STL
1 stop13h 56mFrontier
Deal found 9/9$157
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/209:59 pmSTL - PHX
1 stop16h 07mFrontier
Sun 10/268:03 pmPHX - STL
1 stop13h 40mFrontier
Deal found 9/10$158
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Wed 10/157:52 pmSTL - PHX
1 stop14h 07mFrontier
Tue 10/281:16 pmPHX - STL
1 stop17h 51mFrontier
Deal found 9/10$159
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/276:05 amMCI - PHX
Nonstop2h 50mSouthwest
Wed 10/296:05 amPHX - MCI
Nonstop2h 30mSouthwest
Deal found 9/9$160
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/216:15 amSTL - PHX
Nonstop3h 20mSouthwest
Fri 10/245:25 amPHX - STL
Nonstop2h 50mSouthwest
Deal found 9/10$160
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/72:56 pmMCI - PHX
Nonstop2h 54mAmerican Airlines
Tue 10/147:18 pmPHX - MCI
Nonstop2h 37mAmerican Airlines
Deal found 9/10$161
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/27:45 pmSTL - PHX
1 stop5h 44mFrontier
Thu 11/67:01 amPHX - STL
1 stop5h 56mFrontier
Deal found 9/11$161
This Frontier deal was found by Cheapflights users on 9/11. 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 10/210:49 amSTL - PHX
1 stop10h 21mFrontier
Sun 10/56:00 amPHX - STL
1 stop7h 04mFrontier
Deal found 9/11$162
This CheapOair deal was found by Cheapflights users on 9/11. 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.
Sun 11/28:28 pmMCI - PHX
1 stop15h 57mFrontier
Sun 11/910:53 pmPHX - MCI
1 stop19h 40mFrontier
Deal found 9/11$163
This CheapOair deal was found by Cheapflights users on 9/10. 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.
Fri 9/267:55 pmSTL - PHX
1 stop22h 07mFrontier
Wed 10/112:39 pmPHX - STL
1 stop18h 27mFrontier
Deal found 9/10$163
This Frontier deal was found by Cheapflights users on 9/8. 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 10/164:00 pmMCI - PHX
Nonstop2h 54mFrontier
Sat 10/186:36 amPHX - MCI
1 stop9h 19mFrontier
Deal found 9/8$164

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri to Sky Harbor Intl 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 September 11, 2025.
Use the filters below to find and compare flights from Missouri to Phoenix Sky Harbor Intl Airport that are best for you.

Fly from

Missouri

Fly to

Sky Harbor Intl

Route

Depart

Return

Price

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Wed 10/8

9:50 am-11:10 am

Nonstop3h 20m

Phoenix Sky Harbor Intl

Wed 10/29

5:10 am-10:00 am

Nonstop2h 50m

$159

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 10/21

6:35 am-10:40 am

1 stop6h 05m

Phoenix Sky Harbor Intl

Wed 10/22

5:10 am-10:00 am

Nonstop2h 50m

$169

Kansas CityPhoenix

MCI - PHX

MCIPHX

Kansas City

Fri 12/12

7:05 pm-9:00 pm

Nonstop2h 55m

Phoenix Sky Harbor Intl

Tue 12/16

5:10 am-11:55 am

1 stop5h 45m

$197

Kansas CityPhoenix

MCI - PHX

MCIPHX

Kansas City

Sat 10/18

12:15 pm-4:10 pm

1 stop5h 55m

Phoenix Sky Harbor Intl

Tue 10/21

7:10 pm-11:40 pm

Nonstop2h 30m

$199

Kansas CityPhoenix

MCI - PHX

MCIPHX

Kansas City

Tue 10/14

5:35 pm-6:25 pm

Nonstop2h 50m

Phoenix Sky Harbor Intl

Wed 10/15

6:05 am-10:35 am

Nonstop2h 30m

$204

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Thu 12/4

5:25 pm-7:50 pm

Nonstop3h 25m

Phoenix Sky Harbor Intl

Mon 12/8

6:30 pm-10:20 pm

Nonstop2h 50m

$209

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sat 1/17

2:45 pm-7:40 pm

1 stop5h 55m

Phoenix Sky Harbor Intl

Tue 1/20

6:55 am-10:45 am

Nonstop2h 50m

$209

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sat 1/24

7:40 am-10:15 am

Nonstop3h 35m

Phoenix Sky Harbor Intl

Sat 1/31

7:40 am-5:00 pm

1 stop8h 20m

$213

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sat 10/4

6:20 am-7:40 am

Nonstop3h 20m

Phoenix Sky Harbor Intl

Mon 10/13

6:55 pm-11:50 pm

Nonstop2h 55m

$215

Kansas CityPhoenix

MCI - PHX

MCIPHX

Kansas City

Sat 11/8

4:11 pm-9:02 pm

1 stop5h 51m

Phoenix Sky Harbor Intl

Fri 11/14

12:59 am-9:54 am

1 stop7h 55m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 56 results
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Best time to book a flight from Missouri to Sky Harbor Intl

Have a flexible travel schedule? Discover the best time to fly to Sky Harbor Intl 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 Sky Harbor Intl Airport

What is the cheapest month to book a flight from Missouri to Phoenix Sky Harbor Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Missouri to Phoenix Sky Harbor Intl Airport (average of $258). Flying from Missouri to Phoenix Sky Harbor Intl Airport in March is currently the most expensive (average of $337). 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 Sky Harbor Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Phoenix Sky Harbor Intl Airport as you normally would.

Weekly flight availability from Missouri to Phoenix Sky Harbor Intl Airport

Explore weekly flight availability from Missouri to Sky Harbor Intl. 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 September 11, 2025.

The most flights from USMO to PHX are scheduled on a Wednesday (10 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (1 on average).

Related info for your journey

Find useful and relevant information for your journey from Missouri to Sky Harbor Intl. 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 Sky Harbor Intl Airport?

    Departing from Missouri to Phoenix Sky Harbor Intl Airport will take you 3h 20m. The distance from Missouri to Phoenix Sky Harbor Intl Airport is about 1258 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Missouri to Phoenix Sky Harbor Intl Airport?

    While some choose either Kansas City - Phoenix Sky Harbor Intl or Springfield-Branson - Phoenix Sky Harbor Intl, Lambert-St Louis - Phoenix Sky Harbor Intl is the most popular route from Missouri to Phoenix Sky Harbor Intl Airport.

  • What are the most reliable airlines from Missouri to Phoenix Sky Harbor Intl Airport?

    The top 3 most reliable airlines when flying from Missouri to Phoenix Sky Harbor Intl Airport are SkyWest Airlines (75%), Southwest (69%) and American Airlines (60%).

  • What are the cheapest flights from Missouri to Phoenix Sky Harbor Intl Airport?

    Looking at all options, your cheapest flight can be booked for $103. While the most popular route (Lambert-St Louis - Phoenix Sky Harbor Intl) can be booked for $129 on average, our data indicates $297 when flying from Missouri to Phoenix Sky Harbor Intl Airport.

  • Can I find deals for flights from Missouri to Sky Harbor Intl that include hotel bookings?

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

  • How can I find direct flights from Missouri to Sky Harbor Intl?

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

  • Can I find deals for business class flights from Missouri to Sky Harbor Intl?

    Yes. Cheapflights offers flight deals from Missouri to Sky Harbor Intl 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 Sky Harbor Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Missouri to Phoenix Sky Harbor Intl Airport (average of $258). Flying from Missouri to Phoenix Sky Harbor Intl Airport in March is currently the most expensive (average of $337). 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

Traveling to a place near Phoenix Sky Harbor Intl Airport?

Book flights to Phoenix Sky Harbor Intl Airport if you plan to visit one of these locations
Payson
Glendale
Chandler
Globe
Goodyear
Casa Grande
Buckeye
Camp Verde
Surprise
Peoria
Paradise Valley
Avondale
Guadalupe

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Alternative routes for Missouri to Sky Harbor Intl

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Top 7 airlines flying from Missouri to Sky Harbor Intl

Discover the top 7 airlines that operate flights from Missouri to Sky Harbor Intl. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$100Average$208FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$139Average$225FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$150Average$269FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$203Average$466FlexibilityNo cancel feeOn-time69%
DeltaCheapest$234Average$344FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$249Average$450FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$255Average$408FlexibilityNo cancel feeOn-time63%

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