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$50+ Cheap flights from Tempe, AZ 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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — STL
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheapflights Tip: The best prices from Tempe to Lambert-St Louis are usually found in October or November, booked 87 days in advance, depart on a Tuesday or Friday and return on a Wednesday

Cheap flight deals from Tempe to St. Louis

Cheapest flights from Tempe to St. Louis
Explore the most affordable flight options available from Tempe to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This Frontier deal was found by Cheapflights users on 12/1. 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.
Mon 12/157:25 amPHX - STL
Nonstop2h 57mFrontier
Fri 1/210:10 pmSTL - PHX
1 stop12h 30mFrontier
Deal found 12/1$167
This Kiwi.com deal was found by Cheapflights users on 12/1. 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 12/157:25 amPHX - STL
Nonstop2h 57mFrontier
Thu 1/15:19 pmSTL - PHX
1 stop16h 29mFrontier
Deal found 12/1$174
This Kiwi.com deal was found by Cheapflights users on 12/1. 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.
Fri 12/1210:36 pmPHX - STL
2 stops10h 38mFrontier
Sun 12/141:16 pmSTL - PHX
1 stop20h 32mFrontier
Deal found 12/1$183
This CheapOair deal was found by Cheapflights users on 12/2. 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.
Wed 12/177:43 pmPHX - STL
1 stop19h 41mFrontier
Sat 12/207:43 pmSTL - PHX
1 stop13h 38mFrontier
Deal found 12/2$184
This Frontier deal was found by Cheapflights users on 12/2. 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 12/263:50 pmPHX - STL
Nonstop2h 57mFrontier
Sun 1/410:10 pmSTL - PHX
1 stop11h 38mFrontier
Deal found 12/2$186
This Expedia deal was found by Cheapflights users on 12/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/193:50 pmPHX - STL
Nonstop2h 57mFrontier
Mon 12/2210:10 pmSTL - PHX
1 stop11h 38mFrontier
Deal found 12/2$191
This Kiwi.com deal was found by Cheapflights users on 12/1. 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 12/177:43 pmPHX - STL
1 stop19h 41mFrontier
Fri 1/28:42 pmSTL - PHX
Nonstop3h 31mFrontier
Deal found 12/1$192
This Kiwi.com deal was found by Cheapflights users on 12/1. 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.
Tue 12/164:32 pmPHX - STL
1 stop16h 42mFrontier
Fri 1/210:10 pmSTL - PHX
1 stop12h 30mFrontier
Deal found 12/1$196
This Kiwi.com deal was found by Cheapflights users on 12/4. 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 12/1110:26 pmPHX - STL
1 stop10h 48mFrontier
Sun 12/1410:44 pmSTL - PHX
1 stop11h 04mFrontier
Deal found 12/4$199
This Frontier deal was found by Cheapflights users on 12/3. 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 12/1110:26 pmPHX - STL
1 stop10h 48mFrontier
Mon 12/227:43 pmSTL - PHX
1 stop5h 46mFrontier
Deal found 12/3$203

Find flight deals from Tempe to St. Louis

Keep the following information in mind while searching for Tempe to St. Louis flight deals. Data was last updated December 4, 2025.

Round-trip from

$164
(Kiwi.com)

One-way from

$50
(Frontier)

Popular in

January

Cheapest in

October

Average price

$408
From Tempe to Lambert-St Louis
Search Deals
One-way flight from Tempe to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Tempe 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 2,558,603 searches. Data last updated December 4, 2025.
Use the filters below to find and compare flights from Tempe to St. Louis that are best for you.

Fly from

Tempe

Fly to

St. Louis

Route

Depart

Return

Price

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Wed 1/21

8:30 am-2:46 pm

1 stop5h 16m

Lambert-St Louis

Sun 1/25

5:42 pm-3:35 pm

2 stops22h 53m

$173

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 1/22

4:41 pm-6:44 pm

2 stops25h 03m

Lambert-St Louis

Sun 1/25

9:27 pm-8:20 am

1 stop11h 53m

$175

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Tue 1/20

3:06 pm-6:51 am

2 stops14h 45m

Lambert-St Louis

Mon 1/26

1:40 pm-1:40 pm

1 stop25h 00m

$184

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Tue 1/20

3:06 pm-6:51 am

2 stops14h 45m

Lambert-St Louis

Sun 1/25

9:27 pm-8:20 am

1 stop11h 53m

$196

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Fri 1/16

7:34 pm-2:48 pm

1 stop18h 14m

Lambert-St Louis

Tue 1/20

5:42 pm-1:40 pm

2 stops20h 58m

$212

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Sat 2/21

6:00 am-9:50 am

Nonstop2h 50m

Lambert-St Louis

Sat 2/28

5:50 am-8:30 am

Nonstop3h 40m

$218

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Fri 2/20

9:23 am-4:49 pm

1 stop6h 26m

Lambert-St Louis

Mon 2/23

7:43 pm-10:50 pm

1 stop28h 07m

$218

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Sun 12/14

9:59 pm-12:12 pm

1 stop13h 13m

Lambert-St Louis

Mon 12/15

7:43 pm-12:44 am

1 stop6h 01m

$228

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Sun 12/14

4:12 pm-10:14 am

1 stop17h 02m

Lambert-St Louis

Thu 12/18

5:19 pm-8:48 am

1 stop16h 29m

$233

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Fri 1/9

6:30 pm-10:20 pm

Nonstop2h 50m

Lambert-St Louis

Mon 1/12

6:20 am-11:00 am

1 stop5h 40m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 19 results
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Best time to book a flight from Tempe to St. Louis

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

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

Use this chart to determine the optimal time to book a round-trip flight from Tempe to St. Louis. Price data was last updated on November 28, 2025.

The best time to book flights from Tempe to St. Louis is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, October is the cheapest month in which you can book a flight from Tempe to St. Louis (average of $122). Flying from Tempe to St. Louis in April is currently the most expensive (average of $303). 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 TM9 to STL?

Find hourly flight availability from Tempe 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 December 4, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 56% on flights from Tempe to St. Louis by exploring options for tickets in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from Tempe to St. Louis. Price data was last updated on December 16, 2024.

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

Weekly flight availability from Tempe to St. Louis

Explore weekly flight availability from Tempe 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 December 4, 2025.

The most flights from TM9 to STL are scheduled on a Tuesday (9 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

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 December 4, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Tempe to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,011 reviews
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,066 reviews
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,047 reviews
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,091 reviews
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Tempe 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 Tempe?

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Tempe to St. Louis. You should not have trouble finding flights to Lambert-St Louis from Tempe; the airport handles an average of 7 inbound flights from Tempe per day. You should also have plenty of airline options to choose from since 5 airlines have flights to the St. Louis airport from Tempe. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

  • How long is the flight from Tempe to St. Louis?

    Airlines like Frontier fly from Tempe to St. Louis in about 5h 16m. The time it takes to get you to your destination can typically vary by up to . There are 1258 mi between Tempe and St. Louis.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $70. Users have also found prices from $133 and $138 on Southwest and American Airlines, respectively.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Tempe to St. Louis on time: Frontier (86%), Southwest (77%), Alaska Airlines (77%).

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

    On average you can expect to pay $260 for a flight from Tempe to St. Louis. The cheapest flight overall is $71 while the most popular route, (Phoenix Sky Harbor Intl - Lambert-St Louis) is currently priced at $178.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Tempe to St. Louis (average of $122). Flying from Tempe to St. Louis in April is currently the most expensive (average of $303). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Tempe to St. Louis

Discover the top 5 airlines that operate flights from Tempe 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 2,558,603 searches. Data last updated December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$113Average$224FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$198Average$386FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$229Average$397FlexibilityNo cancel feeOn-time71%
DeltaCheapest$236Average$367FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$264Average$402FlexibilityNo cancel feeOn-time63%

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