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$83+ Cheap flights from Phoenix to St. Louis (STL)

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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — STL
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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The best prices from Phoenix to Lambert-St Louis are usually found in June or July, booked 63 days in advance, depart on a Wednesday or Friday and return on a Tuesday

Cheap flight deals from Phoenix to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Phoenix (PH1) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 20, 2024.

Popular in

December

Cheapest in

June

Round-trip from

$199
(Mytrip)

One-way from

$83
(Trip.com)
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 29% potential price drop
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From Phoenix to Lambert-St Louis
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One-way flight from Phoenix to Lambert-St Louis
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Find flight deals from Phoenix to St. Louis

Cheapest flights from Phoenix to St. Louis
Explore the most affordable flight options available from Phoenix to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2024.

This CheapOair deal was found by Cheapflights users on 11/18. 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.
Mon 11/256:00 amPHX - STL
1 stop17h 06mFrontier
Sat 12/76:46 pmSTL - PHX
1 stop28h 37mFrontier
Deal found 11/18$198
This American Airlines deal was found by Cheapflights users on 11/18. 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 12/189:30 amPHX - STL
Nonstop3h 02mAmerican Airlines
Wed 1/17:24 amSTL - PHX
Nonstop3h 31mAmerican Airlines
Deal found 11/18$277
This Southwest deal was found by Cheapflights users on 11/19. 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.
Wed 12/1110:35 amPHX - STL
Nonstop2h 50mSouthwest
Sat 1/117:30 amSTL - PHX
Nonstop3h 40mSouthwest
Deal found 11/19$293
This United Airlines deal was found by Cheapflights users on 11/19. 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 12/1710:30 amPHX - STL
1 stop4h 59mUnited Airlines
Tue 12/248:35 amSTL - PHX
1 stop7h 53mUnited Airlines
Deal found 11/19$296
This Delta deal was found by Cheapflights users on 11/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1112:55 amPHX - STL
1 stop8h 45mDelta
Mon 12/166:00 amSTL - PHX
1 stop8h 50mDelta
Deal found 11/20$326
This Mytrip deal was found by Cheapflights users on 11/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/119:00 pmPHX - STL
3 stops18h 45mMultiple Airlines
Sat 1/1112:15 pmSTL - PHX
3 stops31h 58mMultiple Airlines
Deal found 11/19$338
This Alaska Airlines deal was found by Cheapflights users on 11/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/126:20 amPHX - STL
2 stops16h 39mAlaska Airlines
Mon 12/167:00 amSTL - PHX
1 stop11h 13mAlaska Airlines
Deal found 11/20$376

Find flights from Phoenix to St. Louis within your budget

Customize your flight search to find flights from Phoenix to St. Louis 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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Wed 12/4

7:25 pm-7:34 pm

1 stop23h 09m

Lambert-St Louis

Sat 12/7

6:46 pm-10:23 pm

1 stop28h 37m

$199

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Wed 12/18

9:30 am-1:32 pm

Nonstop3h 02m

Lambert-St Louis

Wed 1/1

7:24 am-9:55 am

Nonstop3h 31m

$277

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Tue 2/11

6:35 pm-10:25 pm

Nonstop2h 50m

Lambert-St Louis

Tue 2/25

11:00 am-3:25 pm

1 stop5h 25m

$287

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Tue 12/17

10:30 am-4:29 pm

1 stop4h 59m

Lambert-St Louis

Tue 12/24

8:35 am-3:28 pm

1 stop7h 53m

$296

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 12/12

6:20 am-11:59 pm

2 stops16h 39m

Lambert-St Louis

Sun 12/15

8:34 pm-8:18 am

1 stop12h 44m

$298

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Wed 12/11

12:55 am-10:40 am

1 stop8h 45m

Lambert-St Louis

Mon 12/16

6:00 am-1:50 pm

1 stop8h 50m

$326

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Tue 2/11

6:40 am-1:53 pm

2 stops30h 13m

Lambert-St Louis

Tue 2/25

7:00 am-9:49 am

1 stop27h 49m

$350

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Sun 12/15

6:00 am-8:13 am

1 stop25h 13m

$83

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Wed 12/25

9:43 am-1:53 pm

Nonstop3h 10m

$139

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Mon 12/16

12:55 am-10:40 am

1 stop8h 45m

$148

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 15 results
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Best time to book a flight from Phoenix to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Phoenix 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.

Travel insights for flights from Phoenix to St. Louis

Get recent, data-driven insights about flights from Phoenix to St. Louis including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Phoenix to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Phoenix to St. Louis. Price data was last updated on November 15, 2024.

To ensure you get the cheapest price possible for a flight from Phoenix to St. Louis, you should look to book at least 63 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Phoenix to St. Louis?

Currently, September is the cheapest month in which you can book a flight from Phoenix to St. Louis (average of $308). Flying from Phoenix to St. Louis in March is currently the most expensive (average of $357). 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 PHX to STL?

Find hourly flight availability from Phoenix to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 20, 2024.

A simple way to save on the total cost of your ticket is to fly from Phoenix to St. Louis in the afternoon. If you’re flexible enough to do this you can expect to save up to 41% on your trip compared to booking a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Phoenix to St. Louis. Price data was last updated on November 18, 2024.

Travelers seeking maximum savings on their Phoenix to St. Louis flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Phoenix to St. Louis

Explore weekly flight availability from Phoenix to St. Louis. 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 November 20, 2024.

The most flights from PH1 to STL are scheduled on a Monday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated November 20, 2024.
To help decide which airline to fly from Phoenix to St. Louis, see what other customers have to say about American Airlines, Frontier and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,461 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

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

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

    For a flight from Phoenix to St. Louis, you will be flying into Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 8 inbound flights from Phoenix per day. 5 airlines have flights to Lambert-St Louis from Phoenix on a regular basis.

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

    According to our current data, Frontier ($199), American Airlines ($277), and Southwest ($287) offers the cheapest pricing from Phoenix to St. Louis. Users have found that Frontier is 37% cheaper than the other options available to this destination.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $83. Users have also found prices from $139 and $148 on American Airlines and Delta, respectively.

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

    Before booking your flight to St. Louis from Phoenix, check out the most reliable airlines to get you to your destination on time: Southwest (89%), American Airlines (85%), Alaska Airlines( 66%).

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

    On average you can expect to pay $339 for a flight from Phoenix to St. Louis. The cheapest flight overall is $131 while the most popular route, (Phoenix Sky Harbor Intl - Lambert-St Louis) is currently priced at $227.

  • Can I find deals for flights from Phoenix to St. Louis that include hotel bookings?

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

  • How can I find direct flights from Phoenix to St. Louis?

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

  • Can I find deals for business class flights from Phoenix to St. Louis?

    Yes. Cheapflights offers flight deals from Phoenix to St. Louis 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 Phoenix to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from Phoenix to St. Louis (average of $308). Flying from Phoenix to St. Louis in March is currently the most expensive (average of $357). 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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Top 5 airlines flying from Phoenix to St. Louis

Discover the top 5 airlines that operate flights from Phoenix to St. Louis. 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$152FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$131Average$342FlexibilityNo cancel feeOn-time71%
DeltaCheapest$216Average$290FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$262Average$407FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$273Average$512FlexibilityNo cancel feeOn-time69%
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