$112 Cheap flight deals from Phoenix (PHX) to Collinsville (STL)

Earn rewards on top of your airline miles with Orbitz Rewards

Many airlines offer flexible change policies

Sign up to receive text alerts about your trip

This Weekend's Flight Deals from Phoenix to Collinsville

This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jun 6 - Sat, Jun 13
PHX
Sky Harbor Intl.
STL
Lambert-St. Louis Intl.
$323 Roundtrip, found 1 hour ago
$323
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, Jun 6 from Sky Harbor Intl. to Lambert-St. Louis Intl., returning Sat, Jun 13, priced at $323 found 1 hour ago

Airfares from $112 One Way, $220 Round Trip from Phoenix to Collinsville

Prices starting at $220 for return flights and $112 for one-way flights to Collinsville were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 4 - Thu, Aug 6
PHX
Phoenix
STL
St. Louis
$220 Roundtrip, found 1 day ago
$220
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Aug 4 from Phoenix to St. Louis, returning Thu, Aug 6, priced at $220 found 1 day ago
Sat, Aug 8 - Sat, Aug 15
PHX
Phoenix
STL
St. Louis
$238 Roundtrip, found 2 days ago
$238
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, Aug 8 from Phoenix to St. Louis, returning Sat, Aug 15, priced at $238 found 2 days ago
Tue, Aug 4 - Thu, Aug 6
PHX
Phoenix
STL
St. Louis
$245 Roundtrip, found 1 day ago
$245
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Aug 4 from Phoenix to St. Louis, returning Thu, Aug 6, priced at $245 found 1 day ago
Wed, Jul 29 - Sat, Aug 1
PHX
Phoenix
STL
St. Louis
$248 Roundtrip, found 6 days ago
$248
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Wed, Jul 29 from Phoenix to St. Louis, returning Sat, Aug 1, priced at $248 found 6 days ago
Tue, Aug 4 - Thu, Aug 6
PHX
Phoenix
STL
St. Louis
$252 Roundtrip, found 1 day ago
$252
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Aug 4 from Phoenix to St. Louis, returning Thu, Aug 6, priced at $252 found 1 day ago

Collinsville economy flight packages

Price found within the past 48 hours. Click for updated prices.
The Principal Hotel
3.5-star property

The Principal Hotel

9.8/10 Exceptional! (267 reviews)

Jul 25 - Jul 27

2 night stay

Phoenix (PHX) to St. Louis (STL)

Frontier Airlines • Non-stop roundtrip • Coach
Price was $461, price is now $395 per person
$395
per person
found 6 hours ago
The Wildwood Hotel
3.5-star property

The Wildwood Hotel

9.2/10 Wonderful! (1,650 reviews)

Jul 25 - Jul 27

2 night stay

Phoenix (PHX) to St. Louis (STL)

Frontier Airlines • Non-stop roundtrip • Coach
Price was $616, price is now $430 per person
$430
per person
found 6 hours ago
Hotel was clean but honestly, outdated. Staff was great. The continental breakfast was fine. Biggest issue was the shower. There was next to no water pressure no matter the time of day. The mattress also felt cheap. I’m not a picky person and overall, I would stay again. Just maybe not in an upgraded room. I don’t feel like it was worth it.

Reviewed on Feb 24, 2026

21C Museum Hotel St Louis
4.5-star property

21C Museum Hotel St Louis

9/10 Wonderful! (1,840 reviews)

Jul 25 - Jul 27

2 night stay

Phoenix (PHX) to St. Louis (STL)

Frontier Airlines • Non-stop roundtrip • Coach
Price was $709, price is now $597 per person
$597
per person
found 6 hours ago
The cafe that sold breakfast ran out of healthy options each morning (yogurt parfait cup/ overnight oats & quinoa $8 each) They had other plates, egg with meat, etc that looked nice fwiw. Cute gift shop in the cafe. Fashionable hotel with no real 'front desk' just a checkin counter, but volunteers were staffing a St. Louis info table in the lobby while we were there- very friendly. The bar/tapas restaurant across the lobby was fun, $$, and kitchen closed at 10 or so when our events got out so I didn't get to try it. LOVED the historic building, originally a YMCA, the handsome billiards room and the terrific tiled pool with vaulted ceiling- they don't make them like that anymore. Steam room, sauna, showers were great- bring a room towel in case the spa runs short! Open til 10:30p or 11p fyi. Art Museum on the 2nd floor is free to visitors, and had some challenging, gorgeous, funny, and thought-provoking art. Historic Campbell Mansion next door was a neat contrast and a quick peek into the high Victorian era. Glad I went, would stay again

Reviewed on Jan 14, 2026

Don't see what you're looking for?
See all available trips from Phoenix to Collinsville
View all trips

More About Flying To Collinsville from Phoenix

Route Information for Flights from Phoenix to Collinsville

Origin Airport IATA Code
PHX
Destination Airport IATA Code
STL
Distance
Direct Flight Airlines
Earliest Flight Arrival
Latest Flight Arrival

Phoenix to Collinsville

Using Orbitz can save you a significant amount of money and time when booking Phoenix to Collinsville flights. With cutting-edge mobile tools for on-the-move travel planning and guaranteed low prices, Orbitz is the ultimate resource for travelers looking for great deals.

Book Your Phoenix to Collinsville Flights From Any Location

Orbitz now offers free apps for iPad, iPhone, and Android users. You can use Orbitz on these devices to search for affordable fares and to book flights from Phoenix to Collinsville. Mobile apps also allow users to view, compare, and book hotel rooms with just a few taps on the screen and let you access up-to-date flight and baggage claim information in a matter of seconds.

Fly Cheap and Boost Your Frequent Flyer Miles

Earn miles or points on select Phoenix to Collinsville flights to boost your frequent flyer travel rewards. When using Orbitz to book domestic or international flights, include your frequent flyer numbers or add these details to your Orbitz user profile so they are included with your reservation.

Keep Everyone Updated With Flight Alerts

Orbitz is the ideal way to book flights from Phoenix to Collinsville. Free Orbitz alerts can be sent to you and as many as six of your contacts about changes to your Phoenix to Collinsville flights. This keeps everyone notified of flight delays or any other disruptions that might impact your arrival time.

Orbitz Makes It Easy to Plan Your Trips on a Budget

You can always find affordable flights from Phoenix to Collinsville on Orbitz. Use different airlines to book arrival and departure flights, take advantage of vacation package deals, and secure exclusive rewards.

Frequently asked questions

Are there non-stop flights from Phoenix to Collinsville?
There most certainly are, which is terrific news if you're not a huge fan of layovers. Southwest Airlines and American Airlines operate nonstop flights from Sky Harbor Intl. Airport (PHX) to STL.
What is the shortest flight from Phoenix to Collinsville?
Keep that movie marathon for your hotel room, because the trip from Phoenix to Collinsville can take as little as 2 hours and 45 minutes.
What airlines fly from Phoenix to Collinsville most frequently?
The carriers that offer the most frequent flights between Phoenix, AZ (PHX-Sky Harbor Intl.) and Lambert-St. Louis Intl. Airport (STL) include Southwest Airlines (WN). This popular option operates 95 flights on the route each month. If you can't find the right flight there, check out the fares with American Airlines (AA). This airline is a fantastic alternative and has 56 flights between Phoenix and Collinsville each month.
What is the cheapest day of the week to fly?
Consider flying out early in the week to save on your airfare. Orbitz data from 2021 shows that Monday is the cheapest day to depart, followed by Tuesday. Saturday showed the highest average ticket prices likely because many travelers prefer to start their vacation on a weekend.
What is the cheapest month to fly?
We won't keep you guessing, according to Orbitz data from 2021, the cheapest month to fly is February. Perfect for those who need a weekend getaway, or just a break from it all in the shortest month of the year. Be aware that the most expensive time to fly is during the height of summer in July, and in the holiday month of December.*According to flight demand on Orbitz.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

More Destinations

Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.