What are the cheapest airlines flying from Phoenix Sky Harbor Intl Airport to St. Louis round-trip?

Currently priced at $231, Spirit Airlines will fly you from Phoenix Sky Harbor Intl Airport to St. Louis and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and Southwest - these airlines can fly you to your destination from $248 and $257, respectively. You may be able to fly from Phoenix Sky Harbor Intl Airport to St. Louis for 38% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Phoenix Sky Harbor Intl Airport to St. Louis one-way?

The cheapest airlines for a one-way flight from Phoenix Sky Harbor Intl Airport to St. Louis are Spirit Airlines ($60), Frontier ($72), and American Airlines ($129).

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.

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).

What are the cheapest flights from Phoenix Sky Harbor Intl Airport to St. Louis?

While on average a flight from Phoenix Sky Harbor Intl Airport to St. Louis is generally $318, our data shows the cheapest flight currently is $159. When looking at the most popular route, (Phoenix Sky Harbor Intl - Lambert-St Louis), you can expect to pay $160 for that flight.

What are the most reliable airlines from Phoenix Sky Harbor Intl Airport 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 Phoenix Sky Harbor Intl Airport to St. Louis on time: SkyWest Airlines (95%), Alaska Airlines (87%), American Airlines (85%).

What are the most popular airlines that fly from Phoenix Sky Harbor Intl Airport to St. Louis?

Before booking your flight from Phoenix Sky Harbor Intl Airport to St. Louis check out the most popular airlines for this route: American Airlines, Delta or Frontier.

What is the cheapest day to fly round-trip from Phoenix Sky Harbor Intl Airport to St. Louis?

Travelers have found that booking a Monday departure is the best way to save up to 18% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

What is the cheapest month to fly from Phoenix Sky Harbor Intl Airport to St. Louis?

August can be a great time to fly to St. Louis from Phoenix Sky Harbor Intl Airport with a flight ticket averaging about $378. Cheapflights users have found deals in the month of August for as cheap as $131. The most expensive prices can be found in the month of January.

What airport do you fly into for flights to St. Louis from Phoenix Sky Harbor Intl?

Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to St. Louis from Phoenix Sky Harbor Intl. Booking flights from Phoenix Sky Harbor Intl to Lambert-St Louis (STL) should be relatively easy as there are 3 daily inbound flights from Phoenix Sky Harbor Intl from 5 different airlines.

Can I find deals for flights from Sky Harbor Intl to St. Louis that include hotel bookings?

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

How can I find direct flights from Sky Harbor Intl to St. Louis?

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

Can I find deals for business class flights from Sky Harbor Intl to St. Louis?

Yes. Cheapflights offers flight deals from Sky Harbor Intl 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.

$60+ Flights from Phoenix Sky Harbor Intl Airport to St. Louis

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Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Lambert-St Louis are usually found in August or September, booked 87 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Sky Harbor Intl to St. Louis

Round-trip from	$231 (Cheapflightsfares)
One-way from	$60 (Orbitz)
Popular in	January
Cheapest in	August
Average price	$319
Good round-trip deal	$364 or less
Good one-way deal	$198 or less

From Phoenix Sky Harbor Intl to Lambert-St Louis

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One-way flight from Phoenix Sky Harbor Intl to Lambert-St Louis

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Highest demand for flights based on searches. 11% potential increase in price ($48 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Price to beat on a round-trip flight from Phoenix Sky Harbor Intl to Lambert-St Louis.

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Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Lambert-St Louis.

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Find flight deals from Sky Harbor Intl to St. Louis

Cheapest flights from Sky Harbor Intl to St. Louis
Explore the most affordable flight options available from Sky Harbor Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Thu 10/233:16 pmPHX - STL

1 stop14h 33mSpirit Airlines

Sun 10/268:44 amSTL - PHX

1 stop7h 27mSpirit Airlines

Deal found 7/3

$236

Tue 7/297:18 amPHX - STL

1 stop23h 53mMultiple Airlines

Thu 9/42:30 pmSTL - PHX

1 stop9h 34mMultiple Airlines

Deal found 7/2

$237

Wed 8/2712:11 pmPHX - STL

1 stop19h 00mFrontier

Sat 8/307:54 pmSTL - PHX

1 stop15h 36mFrontier

Deal found 7/1

$248

Thu 8/76:30 pmPHX - STL

Nonstop2h 55mSouthwest

Mon 8/119:40 pmSTL - PHX

Nonstop3h 15mSouthwest

Deal found 7/1

$257

Thu 8/77:11 pmPHX - STL

Nonstop3h 05mAmerican Airlines

Sat 8/98:50 amSTL - PHX

1 stop9h 19mAmerican Airlines

Deal found 7/3

$284

Best flights from Sky Harbor Intl to St. Louis
Discover carefully curated flight deals from Sky Harbor Intl to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Sun 7/2011:49 pmPHX - STL

1 stop8h 03mSpirit Airlines

Thu 7/2410:47 amSTL - PHX

1 stop13h 47mSpirit Airlines

Deal found 7/3

$231

Tue 7/297:18 amPHX - STL

1 stop23h 53mMultiple Airlines

Thu 9/42:30 pmSTL - PHX

1 stop9h 34mMultiple Airlines

Deal found 7/3

$234

Wed 8/2712:11 pmPHX - STL

1 stop19h 00mFrontier

Sat 8/307:54 pmSTL - PHX

1 stop15h 36mFrontier

Deal found 7/1

$248

Thu 8/76:30 pmPHX - STL

Nonstop2h 55mSouthwest

Mon 8/119:40 pmSTL - PHX

Nonstop3h 15mSouthwest

Deal found 7/1

$257

Thu 8/77:11 pmPHX - STL

Nonstop3h 05mAmerican Airlines

Sat 8/98:50 amSTL - PHX

1 stop9h 19mAmerican Airlines

Deal found 7/3

$284

Last-minute flights from Sky Harbor Intl to St. Louis
Discover last-minute flight deals from Sky Harbor Intl to St. Louis. Data last updated July 3, 2025 and is based on user searches.

Tue 7/810:32 pmPHX - STL

1 stop7h 47mAmerican Airlines

Sat 8/27:44 amSTL - PHX

Nonstop3h 15mAmerican Airlines

Deal found 7/3

$332

Tue 7/85:20 pmPHX - STL

1 stop5h 18mDelta

Sat 8/23:59 pmSTL - PHX

1 stop6h 04mDelta

Deal found 7/3

$342

Tue 7/85:15 amPHX - STL

Nonstop2h 55mSouthwest

Sat 8/29:10 pmSTL - PHX

Nonstop3h 10mSouthwest

Deal found 7/3

$362

Tue 7/810:32 amPHX - STL

2 stops11h 27mUnited Airlines

Sat 8/25:30 pmSTL - PHX

1 stop6h 25mUnited Airlines

Deal found 7/3

$427

Wed 7/911:34 pmPHX - STL

1 stop8h 18mSpirit Airlines

Mon 7/1410:47 amSTL - PHX

1 stop13h 47mSpirit Airlines

Deal found 7/1

$308

Fri 7/118:21 pmPHX - STL

1 stop10h 50mMultiple Airlines

Fri 7/2510:47 amSTL - PHX

1 stop13h 47mMultiple Airlines

Deal found 7/1

$242

Sun 7/137:17 pmPHX - STL

2 stops11h 54mFrontier

Wed 7/167:29 pmSTL - PHX

1 stop5h 15mFrontier

Deal found 7/1

$315

Thu 7/1711:49 pmPHX - STL

1 stop8h 03mSpirit Airlines

Sun 7/2010:47 amSTL - PHX

1 stop13h 47mSpirit Airlines

Deal found 7/2

$239

Tue 7/292:03 pmPHX - STL

1 stop17h 08mMultiple Airlines

Fri 8/110:47 amSTL - PHX

1 stop13h 47mMultiple Airlines

Deal found 7/2

$236

Thu 8/76:30 pmPHX - STL

Nonstop2h 55mSouthwest

Mon 8/119:40 pmSTL - PHX

Nonstop3h 15mSouthwest

Deal found 7/1

$257

Thu 8/77:11 pmPHX - STL

Nonstop3h 05mAmerican Airlines

Sat 8/98:50 amSTL - PHX

1 stop9h 19mAmerican Airlines

Deal found 7/3

$284

Wed 8/2712:11 pmPHX - STL

1 stop19h 00mFrontier

Sat 8/307:54 pmSTL - PHX

1 stop15h 36mFrontier

Deal found 7/1

$248

One-way flights from Sky Harbor Intl to St. Louis
Search for one-way flight options from Sky Harbor Intl to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Thu 7/2411:49 pmPHX - STL

1 stop8h 03mSpirit Airlines

Deal found 7/1

$60

Thu 7/246:00 amPHX - STL

1 stop5h 42mFrontier

Deal found 7/2

$72

Mon 9/17:11 pmPHX - STL

Nonstop3h 05mAmerican Airlines

Deal found 7/2

$129

Mon 8/116:05 amPHX - STL

1 stop5h 00mSouthwest

Deal found 7/2

$138

Mon 8/41:40 pmPHX - STL

1 stop7h 40mDelta

Deal found 7/2

$139

Tue 9/96:05 amPHX - STL

2 stops7h 39mUnited Airlines

Deal found 7/2

$144

Cheapflights Fare Finder

Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Tue 7/29

2:03 pm-9:11 am

1 stop17h 08m

Lambert-St Louis

Fri 8/1

10:47 am-10:34 pm

1 stop13h 47m

$236

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 7/17

11:49 pm-9:52 am

1 stop8h 03m

Lambert-St Louis

Sun 7/20

10:47 am-10:34 pm

1 stop13h 47m

$239

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Wed 8/27

12:11 pm-9:11 am

1 stop19h 00m

Lambert-St Louis

Sat 8/30

7:54 pm-9:30 am

1 stop15h 36m

$248

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 8/7

6:30 pm-11:25 pm

Nonstop2h 55m

Lambert-St Louis

Mon 8/11

9:40 pm-10:55 pm

Nonstop3h 15m

$257

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 8/7

7:11 pm-12:16 am

Nonstop3h 05m

Lambert-St Louis

Sat 8/9

8:50 am-4:09 pm

1 stop9h 19m

$284

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 7/24

11:49 pm-9:52 am

1 stop8h 03m

$60

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 7/24

6:00 am-1:42 pm

1 stop5h 42m

$72

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Mon 9/1

7:11 pm-12:16 am

Nonstop3h 05m

$129

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Mon 8/11

6:05 am-1:05 pm

1 stop5h 00m

$138

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Mon 8/4

1:40 pm-11:20 pm

1 stop7h 40m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 11 results

The best insider tips for Phoenix Sky Harbor Intl Airport to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Phoenix Sky Harbor Intl Airport to St. Louis trip

Airports

PHX

PHX offers short security lines, typically under 10 minutes, ensuring a quick start to your journey to STL.

STL

Use the MetroLink light rail from STL for a convenient, economical ride to downtown St. Louis in about 40 minutes.

Our travel experts

Brandon Schultz

Expert on PHX

Taryn White

Expert on STL

Best time to book a flight from Sky Harbor Intl to St. Louis

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

How far ahead should I book a flight from Phoenix Sky Harbor Intl Airport to St. Louis?

To ensure you get the cheapest price possible for a flight from Phoenix Sky Harbor Intl Airport to St. Louis, you should look to book at least 87 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 Sky Harbor Intl Airport to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to St. Louis (average of $311). Flying from Phoenix Sky Harbor Intl Airport to St. Louis in March is currently the most expensive (average of $356). 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?

A simple way to save on the total cost of your ticket is to fly from Phoenix Sky Harbor Intl Airport to St. Louis in the afternoon. 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.

What is the cheapest day to fly from Phoenix Sky Harbor Intl Airport to St. Louis?

Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport to St. Louis flight should consider departing on Tuesday 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.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Southwest, Delta, and United Airlines from Phoenix Sky Harbor Intl Airport 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

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,266 reviews

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Delta

8.0

Very good

7,982 reviews

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

United Airlines

7.4

Good

8,861 reviews

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Spirit Airlines

6.3

Okay

8,086 reviews

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

What airport do you fly into for flights to St. Louis from Phoenix Sky Harbor Intl?
Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to St. Louis from Phoenix Sky Harbor Intl. Booking flights from Phoenix Sky Harbor Intl to Lambert-St Louis (STL) should be relatively easy as there are 3 daily inbound flights from Phoenix Sky Harbor Intl from 5 different airlines.
What are the cheapest airlines flying from Phoenix Sky Harbor Intl Airport to St. Louis round-trip?
Currently priced at $231, Spirit Airlines will fly you from Phoenix Sky Harbor Intl Airport to St. Louis and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and Southwest - these airlines can fly you to your destination from $248 and $257, respectively. You may be able to fly from Phoenix Sky Harbor Intl Airport to St. Louis for 38% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Phoenix Sky Harbor Intl Airport to St. Louis one-way?
The cheapest airlines for a one-way flight from Phoenix Sky Harbor Intl Airport to St. Louis are Spirit Airlines ($60), Frontier ($72), and American Airlines ($129).
What are the most reliable airlines from Phoenix Sky Harbor Intl Airport 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 Phoenix Sky Harbor Intl Airport to St. Louis on time: SkyWest Airlines (95%), Alaska Airlines (87%), American Airlines (85%).
What are the cheapest flights from Phoenix Sky Harbor Intl Airport to St. Louis?
While on average a flight from Phoenix Sky Harbor Intl Airport to St. Louis is generally $318, our data shows the cheapest flight currently is $159. When looking at the most popular route, (Phoenix Sky Harbor Intl - Lambert-St Louis), you can expect to pay $160 for that flight.
Can I find deals for flights from Sky Harbor Intl to St. Louis that include hotel bookings?
Yes. In addition to deals on Sky Harbor Intl to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Sky Harbor Intl to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sky Harbor Intl to St. Louis.
Can I find deals for business class flights from Sky Harbor Intl to St. Louis?
Yes. Cheapflights offers flight deals from Sky Harbor Intl 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 Sky Harbor Intl Airport to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to St. Louis (average of $311). Flying from Phoenix Sky Harbor Intl Airport to St. Louis in March is currently the most expensive (average of $356). 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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Eureka

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Glencoe

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Festus

Chesterfield

Farmington

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Top 5 airlines flying from Sky Harbor Intl to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$109	Average$218	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$183	Average$381	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$216	Average$306	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$263	Average$378	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$301	Average$416	FlexibilityNo cancel fee	On-time63%

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$60+ Cheap flights from Sky Harbor Intl (PHX) 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 7/24. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Sky Harbor Intl to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Lambert-St Louis are usually found in August or September, booked 87 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Sky Harbor Intl to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Sky Harbor Intl to St. Louis

Cheapest flights from Sky Harbor Intl to St. LouisExplore the most affordable flight options available from Sky Harbor Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Explore the most affordable flight options available from Sky Harbor Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to St. Louis that are best for you.

The best insider tips for Phoenix Sky Harbor Intl Airport to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Phoenix Sky Harbor Intl Airport to St. Louis trip

Airports

PHX

STL

Our travel experts

Best time to book a flight from Sky Harbor Intl to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Sky Harbor Intl with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Phoenix Sky Harbor Intl Airport to St. Louis

How far ahead should I book a flight from Phoenix Sky Harbor Intl Airport to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Sky Harbor Intl to St. Louis. Price data was last updated on June 27, 2025.

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

What is the cheapest time of day to fly from PHX to STL?

Find hourly flight availability from Sky Harbor Intl 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 July 3, 2025.

What is the cheapest day to fly from Phoenix Sky Harbor Intl Airport to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Sky Harbor Intl to St. Louis. Price data was last updated on June 29, 2025.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Southwest, Delta, and United Airlines from Phoenix Sky Harbor Intl Airport 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.

Related info for your journey

Find useful and relevant information for your journey from Sky Harbor Intl 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 Sky Harbor Intl?

What are the cheapest airlines flying from Phoenix Sky Harbor Intl Airport to St. Louis round-trip?

What are the cheapest airlines to fly from Phoenix Sky Harbor Intl Airport to St. Louis one-way?

What are the most reliable airlines from Phoenix Sky Harbor Intl Airport to St. Louis?

What are the cheapest flights from Phoenix Sky Harbor Intl Airport to St. Louis?

Can I find deals for flights from Sky Harbor Intl to St. Louis that include hotel bookings?

How can I find direct flights from Sky Harbor Intl to St. Louis?

Can I find deals for business class flights from Sky Harbor Intl to St. Louis?

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

Traveling to a place near Phoenix Sky Harbor Intl Airport?

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Alternative routes for Sky Harbor Intl to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Sky Harbor Intl to St. Louis

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Cheapest flights from Sky Harbor Intl to St. Louis
Explore the most affordable flight options available from Sky Harbor Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.