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Cheap flights from Phoenix to St. Louis (STL) from $37

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 5/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
PHX — STL
May 14 — May 211
From?
To?
Tue 5/14
Tue 5/21
1 adult, Economy
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The best prices from Phoenix to Lambert-St Louis are usually found in May or April, booked 90 days in advance, depart on a Tuesday or Wednesday 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 May 9, 2024.

Popular in

December

Cheapest in

May

Round-trip from

$322

One-way from

$125
High demand for flights, 13% potential price rise
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Best time to find cheap flights, 30% 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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What is the cheapest day to fly round-trip from Phoenix to St. Louis?

Travelers have found that booking a Monday departure is the best way to save up to 36% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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

To save up to 72% on this flight, we recommend booking at least 28 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Phoenix to St. Louis from $233 1-2 weeks out and tickets from $478 for flights departing within the next 72 hours.

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

May can be a great time to fly to St. Louis from Phoenix with a flight ticket averaging about $358. Cheapflights users have found deals in the month of May for as cheap as $78. The most expensive prices can be found in the month of December.

When is the cheapest time to fly from Phoenix to St. Louis (PHX - STL)?

A simple way to save on the total cost of your ticket is to fly from Phoenix to St. Louis in the evening. If you’re flexible enough to do this you can expect to save up to 24% on your trip compared to booking a flight at noon.

Cheap Frontier flights from Phoenix to St. Louis

Explore cheap flight options specifically provided by Frontier for the route between Phoenix and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
Find some of the cheapest Frontier flights traveling from Phoenix to St. Louis. Make sure to check back often as deals are often changing.
Sat 5/185:50 pmPHX - STL
Nonstop2h 59mFrontier
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$58
Wed 5/1510:45 amPHX - STL
Nonstop2h 54mFrontier
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$62
Mon 5/204:32 pmPHX - STL
Nonstop2h 59mFrontier
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$68
Wed 5/1510:45 amPHX - STL
Nonstop2h 54mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$72
Fri 5/174:32 pmPHX - STL
Nonstop2h 59mFrontier
Sat 5/1811:41 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$74
Wed 6/55:08 pmPHX - STL
Nonstop2h 59mFrontier
Wed 6/1210:57 pmSTL - PHX
Nonstop3h 18mFrontier
Deal found 5/8$78
Fri 5/174:32 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$84
Sat 5/255:50 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2710:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$88
Fri 6/75:05 pmPHX - STL
Nonstop2h 54mFrontier
Sat 6/810:43 pmSTL - PHX
Nonstop3h 16mFrontier
Deal found 5/8$89

Cheap American Airlines flights from Phoenix to St. Louis

Explore cheap flight options specifically provided by American Airlines for the route between Phoenix and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
Take a gander at the lowest prices we've found on American Airlines flights from Phoenix to St. Louis. Check back soon if you're not seeing flights that suit your needs.
Sat 6/16:56 pmPHX - STL
Nonstop3h 00mAmerican Airlines
Tue 6/187:35 amSTL - PHX
Nonstop3h 20mAmerican Airlines
Deal found 5/8$131
Sat 6/16:56 pmPHX - STL
Nonstop3h 00mAmerican Airlines
Tue 6/48:00 amSTL - PHX
Nonstop3h 24mAmerican Airlines
Deal found 5/8$141
Thu 5/306:56 pmPHX - STL
Nonstop3h 00mAmerican Airlines
Sun 6/307:35 amSTL - PHX
Nonstop3h 20mAmerican Airlines
Deal found 5/8$156
Tue 5/216:56 pmPHX - STL
Nonstop3h 00mAmerican Airlines
Wed 5/298:00 amSTL - PHX
Nonstop3h 24mAmerican Airlines
Deal found 5/8$181
Fri 9/66:50 pmPHX - STL
Nonstop2h 59mAmerican Airlines
Tue 9/108:05 amSTL - PHX
Nonstop3h 17mAmerican Airlines
Deal found 5/8$195
Fri 5/248:45 amPHX - STL
Nonstop3h 03mAmerican Airlines
Sat 5/258:00 amSTL - PHX
Nonstop3h 24mAmerican Airlines
Deal found 5/8$211
Mon 6/312:59 amPHX - STL
1 stop6h 54mAmerican Airlines
Tue 6/117:35 amSTL - PHX
Nonstop3h 20mAmerican Airlines
Deal found 5/9$218
Sat 6/111:50 pmPHX - STL
1 stop7h 29mAmerican Airlines
Tue 6/186:11 pmSTL - PHX
Nonstop3h 17mAmerican Airlines
Deal found 5/8$219
Thu 6/66:56 pmPHX - STL
Nonstop2h 54mAmerican Airlines
Tue 6/117:35 amSTL - PHX
Nonstop3h 20mAmerican Airlines
Deal found 5/7$231

Cheap Phoenix to St. Louis flights in May & June 2024

Find cheap flight options from Phoenix to St. Louis specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Prices were last updated on May 9, 2024.
These are some of the best deals we've found on flights to St. Louis in 2024 at this time. Check back soon for alternative fares.
Sat 5/185:50 pmPHX - STL
Nonstop2h 59mFrontier
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$58
Wed 5/1510:45 amPHX - STL
Nonstop2h 54mFrontier
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$62
Sat 5/185:50 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$68
Wed 5/1510:45 amPHX - STL
Nonstop2h 54mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$72
Fri 5/174:32 pmPHX - STL
Nonstop2h 59mFrontier
Sat 5/1811:41 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$74
Wed 6/55:08 pmPHX - STL
Nonstop2h 59mFrontier
Wed 6/1210:57 pmSTL - PHX
Nonstop3h 18mFrontier
Deal found 5/8$78
Fri 5/174:32 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$84
Sat 5/255:50 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2710:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$88
Fri 6/75:05 pmPHX - STL
Nonstop2h 54mFrontier
Sat 6/810:43 pmSTL - PHX
Nonstop3h 16mFrontier
Deal found 5/8$89

Phoenix to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Phoenix and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
These are some of the best deals we've found on flights to St. Louis in 2024 at this time. Check back soon for alternative fares.
Sat 5/185:50 pmPHX - STL
Nonstop2h 59mFrontier
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$58
Wed 5/1510:45 amPHX - STL
Nonstop2h 54mFrontier
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$62
Sat 5/185:50 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$68
Wed 5/1510:45 amPHX - STL
Nonstop2h 54mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$72
Fri 5/174:32 pmPHX - STL
Nonstop2h 59mFrontier
Sat 5/1811:41 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$74
Wed 6/55:08 pmPHX - STL
Nonstop2h 59mFrontier
Wed 6/1210:57 pmSTL - PHX
Nonstop3h 18mFrontier
Deal found 5/8$78
Fri 5/174:32 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$84
Sat 5/255:50 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2710:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$88
Fri 6/75:05 pmPHX - STL
Nonstop2h 54mFrontier
Sat 6/810:43 pmSTL - PHX
Nonstop3h 16mFrontier
Deal found 5/8$89

Non-stop flights to St. Louis from Phoenix

Discover non-stop flight options from Phoenix to St. Louis. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
Consider booking one of these non-stop flights heading from Phoenix to St. Louis. Users can also choose from other Phoenix to St. Louis flights by using the search form above.
Sat 5/185:50 pmPHX - STL
Nonstop2h 59mFrontier
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$58
Sat 5/185:50 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$68
Wed 6/55:08 pmPHX - STL
Nonstop2h 59mFrontier
Wed 6/1210:57 pmSTL - PHX
Nonstop3h 18mFrontier
Deal found 5/8$78
Sat 5/255:50 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2710:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$88
Fri 6/75:05 pmPHX - STL
Nonstop2h 54mFrontier
Sat 6/810:43 pmSTL - PHX
Nonstop3h 16mFrontier
Deal found 5/8$89
Fri 5/244:32 pmPHX - STL
Nonstop2h 59mFrontier
Sat 5/2511:41 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/7$99
Wed 5/294:32 pmPHX - STL
Nonstop2h 59mFrontier
Mon 6/310:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$123
Wed 7/35:08 pmPHX - STL
Nonstop2h 59mFrontier
Mon 7/89:26 pmSTL - PHX
Nonstop3h 18mFrontier
Deal found 5/8$129
Sat 6/2212:16 pmPHX - STL
Nonstop2h 55mAmerican Airlines
Mon 7/226:09 pmSTL - PHX
Nonstop3h 11mAmerican Airlines
Deal found 5/8$131

Phoenix to St. Louis flights leaving soon

Find last-minute flight options from Phoenix to St. Louis for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
Check out these flights departing soon from Phoenix to St. Louis. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Sat 5/185:50 pmPHX - STL
Nonstop2h 59mFrontier
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$58
Wed 5/1510:45 amPHX - STL
Nonstop2h 54mFrontier
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$62
Sat 5/185:50 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$68
Wed 5/1510:45 amPHX - STL
Nonstop2h 54mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$72
Fri 5/174:32 pmPHX - STL
Nonstop2h 59mFrontier
Sat 5/1811:41 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$74
Fri 5/174:32 pmPHX - STL
Nonstop2h 59mFrontier
Mon 5/2010:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$84
Wed 5/1510:45 amPHX - STL
Nonstop2h 54mFrontier
Sat 5/1811:41 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$128
Wed 5/1510:45 amPHX - STL
Nonstop2h 54mFrontier
Fri 5/1710:21 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 5/8$144
Thu 5/166:25 pmPHX - STL
1 stop15h 55mMultiple Airlines
Wed 5/2210:21 pmSTL - PHX
Nonstop3h 17mMultiple Airlines
Deal found 5/8$157

One-way flights to St. Louis from Phoenix

Search for one-way flight options from Phoenix to St. Louis. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
Some of the best available deals we've found on one-way flights from Phoenix to St. Louis. Users needing a return flight from Phoenix to St. Louis should utilize the search form above.
Wed 5/224:32 pmPHX - STL
Nonstop2h 59mFrontier
Deal found 5/8$37
Wed 6/55:08 pmPHX - STL
Nonstop2h 59mFrontier
Deal found 5/8$39
Sat 7/205:50 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 5/8$40
Sat 6/84:44 pmPHX - STL
Nonstop2h 59mFrontier
Deal found 5/8$41
Fri 5/174:32 pmPHX - STL
Nonstop2h 59mFrontier
Deal found 5/8$45
Mon 5/274:32 pmPHX - STL
Nonstop2h 59mFrontier
Deal found 5/9$49
Fri 6/75:05 pmPHX - STL
Nonstop2h 54mFrontier
Deal found 5/7$50
Fri 5/244:32 pmPHX - STL
Nonstop2h 59mFrontier
Deal found 5/7$60
Mon 6/106:56 pmPHX - STL
Nonstop2h 54mAmerican Airlines
Deal found 5/8$66

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 2,752,338 searches. Data last updated May 9, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$68 - $216

Route

Depart

Return

Price

Phoenix Sky Harbor IntlLambert-St Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Mon 5/20

Nonstop2h 59m

Lambert-St Louis

Wed 5/22

Nonstop3h 17m

$68

Phoenix Sky Harbor IntlLambert-St Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Wed 6/5

Nonstop2h 59m

Lambert-St Louis

Wed 6/12

Nonstop3h 18m

$78

Phoenix Sky Harbor IntlLambert-St Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Sat 5/25

Nonstop2h 59m

Lambert-St Louis

Mon 5/27

Nonstop3h 17m

$88

Phoenix Sky Harbor IntlLambert-St Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Fri 6/7

Nonstop2h 54m

Lambert-St Louis

Sat 6/8

Nonstop3h 16m

$89

Phoenix Sky Harbor IntlLambert-St Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Tue 5/21

1 stop21h 21m

Lambert-St Louis

Wed 5/29

Nonstop3h 17m

$97

Phoenix Sky Harbor IntlLambert-St Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Fri 5/24

Nonstop2h 59m

Lambert-St Louis

Sat 5/25

Nonstop3h 17m

$99

Phoenix Sky Harbor IntlLambert-St Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Tue 5/21

1 stop21h 21m

Lambert-St Louis

Wed 5/29

1 stop24h 44m

$114

Phoenix Sky Harbor IntlLambert-St Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Sat 6/1

Nonstop3h 00m

Lambert-St Louis

Tue 6/18

Nonstop3h 20m

$131

Phoenix Sky Harbor IntlLambert-St Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Sat 6/1

1 stop5h 59m

Lambert-St Louis

Tue 6/18

1 stop6h 18m

$216

Flights are sorted by cheapest first

Deals found on 5/8

When is the best time to 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 May 3, 2024.
To ensure you get the cheapest price possible for a flight from Phoenix to St. Louis, you should look to book at least 90 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.
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When is the cheapest time 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 May 5, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Phoenix to St. Louis flight should consider departing on Wednesday evenings 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.
Search Deals

Average price of flights to St. Louis by month

Plan your trip from Phoenix to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Phoenix to St. Louis is currently $47 while a round-trip flight costs $109. Price data was last updated on May 5, 2024.

Currently, September is the cheapest month in which you can book a flight from Phoenix to St. Louis (average of $322). Flying from Phoenix to St. Louis in July is currently the most expensive (average of $372). 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.

January

$326

February

$331

March

$357

April

$337

May

$342

June

$369

July

$372

August

$336

September

$322

October

$324

November

$336

December

$326

Temperature and rainfall in St. Louis by month

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

STL

Temperature

32 - 80.6 °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 May 9, 2024.
To help decide which airline to fly from Phoenix to St. Louis, see what other customers have to say about Frontier, American Airlines and Spirit Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,141 reviews
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.1
Very good
10,789 reviews
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
11,043 reviews
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
14,677 reviews
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Sun Country Air
7.3
Good
638 reviews
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

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 9 inbound flights from Phoenix per day. 5 airlines have flights to Lambert-St Louis from Phoenix on a regular basis.

  • Can I find flights from Phoenix to St. Louis for under $100 on Cheapflights?

    Yes, there are multiple flights from Phoenix to St. Louis for under $100. The cheapest flight booked recently is on Frontier for just $68, but on average you can expect to pay $123.

  • Are there nonstop flights from Phoenix to St. Louis for under $100 on Cheapflights?

    Cheapflights has at least 20 direct flights from Phoenix to St. Louis under $100. A good price for a nonstop flight from Phoenix to St. Louis is less than $149.

  • Are there last-minute flights available from Phoenix to St. Louis for under $100?

    There are currently 20+ open flights from Phoenix to St. Louis within the next 7 days for less than $100.

  • What days are nonstop flights available from Phoenix to St. Louis?

    Nonstop flights are available for this route on the following days: Tuesday, Thursday, Friday.

  • How many flights depart from Phoenix to St. Louis on average per day?

    3 flight departures from Phoenix to St. Louis per day on average.
    Early Morning (Midnight to 6am) - 33% of flight departures
    Morning (6am - Noon) - 33% of flight departures
    Afternoon (Noon - 6pm) - 33% of flight departures

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

    For as low as $68, Frontier can have you in St. Louis from Phoenix in 2h 59m. Phoenix and St. Louis are separated by a distance of 1266 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Frontier ($68), Spirit Airlines ($114), and American Airlines ($131) offers the cheapest pricing from Phoenix to St. Louis. Users have found that Frontier is 81% 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 $37. Users have also found prices from $66 and $107 on American Airlines and Spirit Airlines, respectively.

  • What are the most popular airlines that fly from Phoenix to St. Louis?

    When booking a flight from Phoenix to St. Louis, you may want to consider flying on American Airlines, Delta or Frontier as they are the most popular for this route.

  • 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 (90%), American Airlines (88%), Alaska Airlines( 78%).

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

    On average you can expect to pay $185 for a flight from Phoenix to St. Louis. The cheapest flight overall is $36 while the most popular route, (Phoenix Sky Harbor Intl - Lambert-St Louis) is currently priced at $121.

  • What does PHX to STL mean?

    Phoenix Sky Harbor Intl Airport is PHX and Lambert-St Louis Airport is STL. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service. Phoenix-Mesa Gateway Airport (AZA), Phoenix Scottsdale Municipal Airport (SCF), Prescott Airport (PRC) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from Phoenix to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring on your Phoenix to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Phoenix to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Phoenix to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from Phoenix to St. Louis that allow pets onboard?

    Many airlines flying from Phoenix to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Phoenix to St. Louis?

    Yes, you can often find last-minute deals on Phoenix to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Phoenix to St. Louis flight deals updated?

    The Phoenix to St. Louis flight deals you see on this page were last updated on 5/8.

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Alternative routes for Phoenix to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.

Sky Harbor Intl to St. Louis flights
Sky Harbor Intl to Kansas City flights
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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 2,752,338 searches. Data last updated May 9, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$79Average$198FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$154Average$285FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
American AirlinesCheapest$248Average$418FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$275Average$421FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$330Average$523FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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Search flights from Phoenix to St. Louis by cabin class

Find flights from Phoenix to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Phoenix to St. Louis

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 May 9, 2024.
10%of flight departuresEarly morningMidnight to 6 am
40%of flight departuresMorning6 am to noon
45%of flight departuresAfternoonNoon to 6 pm
5%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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 May 9, 2024.
Sunday12daily flights
Monday9daily flights
Tuesday9daily flights
Wednesday9daily flights
Thursday9daily flights
Friday9daily flights
Saturday9daily flights

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How does Cheapflights help users find flights from Phoenix to St. Louis?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to St. Louis from Phoenix today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Phoenix to St. Louis?

Cheapflights simply makes it quick and affordable to book flights from Phoenix to St. Louis by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Phoenix to St. Louis with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Phoenix to St. Louis, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Phoenix to St. Louis become cheaper?

Yes! Start tracking prices for Phoenix to St. Louis flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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