$40 Find Cheap Flights from St. Louis to Arizona

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Arizona departing on 2/23. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Arizona

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Arizona.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Arizona.
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Cheap Flights from St. Louis to Arizona

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Tucson
Tucson1 stop$248
Flagstaff
Flagstaff1 stop$406
Las Vegas
Las Vegasnonstop$122
Tucson
Tucson1 stop$248
Flagstaff
Flagstaff1 stop$406
Las Vegas
Las Vegasnonstop$122

Book Cheap St. Louis to Arizona Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Arizona that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Arizona

Sat, Feb 14 - Fri, Feb 20
Frontier Logo
6:41 pm - 8:31 pm
STL
-
LAS
3h 50mnonstop
Frontier Logo
12:59 am - 1:56 pm
LAS
-
STL
10h 57m
1 stop
$122Frontier
Mon, Feb 9 - Thu, Feb 12
Frontier Logo
1:40 pm - 5:35 pm
STL
-
LAS
5h 55m
1 stop
Frontier Logo
4:10 pm - 9:26 pm
LAS
-
STL
3h 16mnonstop
$123Frontier
Mon, Feb 9 - Fri, Feb 13
Frontier Logo
1:40 pm - 5:35 pm
STL
-
LAS
5h 55m
1 stop
Frontier Logo
4:10 pm - 9:26 pm
LAS
-
STL
3h 16mnonstop
$124Frontier
Fri, Feb 27 - Fri, Mar 6
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
Frontier Logo
12:59 am - 9:49 am
LAS
-
STL
6h 50m
1 stop
$126Frontier
Wed, Feb 11 - Wed, Mar 25
United Airlines Logo
2:45 pm - 9:26 pm
STL
-
TUS
7h 41m
1 stop
United Airlines Logo
4:43 pm - 11:34 pm
TUS
-
STL
4h 51m
1 stop
$297United Airlines
Mon, Mar 23 - Thu, Mar 26
Southwest Logo
5:20 pm - 11:10 pm
STL
-
TUS
7h 50m
2 stops
Southwest Logo
3:20 pm - 11:45 pm
TUS
-
STL
6h 25m
1 stop
$312Southwest
Wed, Apr 8 - Wed, Apr 15
Delta Logo
5:21 pm - 9:41 pm
STL
-
TUS
6h 20m
1 stop
Delta Logo
7:05 am - 5:47 pm
TUS
-
STL
8h 42m
1 stop
$321Delta
Sat, Mar 28 - Tue, Mar 31
Delta Logo
6:00 am - 11:30 am
STL
-
TUS
7h 30m
1 stop
Delta Logo
1:30 pm - 1:17 pm
TUS
-
STL
21h 47m
2 stops
$325Delta
Tue, May 12 - Sat, May 16
American Airlines Logo
2:37 pm - 6:44 pm
STL
-
FLG
6h 07m
1 stop
American Airlines Logo
5:01 pm - 11:59 pm
FLG
-
STL
4h 58m
1 stop
$406American Airlines
Mon, Feb 2 - Fri, Feb 6
American Airlines Logo
6:00 am - 12:48 pm
STL
-
FLG
7h 48m
1 stop
American Airlines Logo
7:24 am - 1:53 pm
FLG
-
STL
5h 29m
1 stop
$416American Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Arizona flights

Get data-powered insights and trends into flights from St. Louis to Arizona to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest St. Louis to Arizona flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Arizona from St. Louis found in the last 72 hours was to Phoenix, at $186 round-trip. The most popular route is from St. Louis (STL) to Phoenix Sky Harbor Intl Airport (PHX), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $186.

Can I save money by flying with a layover from St. Louis to Arizona?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $340, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Arizona, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Arizona is November, when tickets cost $308 (return) on average. On the other hand, the most expensive months are March and June, when the average cost of round-trip tickets is $440 and $419 respectively.

What’s the cheapest day of the week to fly from St. Louis to Arizona?

The average price of all round-trip flights from St. Louis to Arizona clicked on KAYAK for each day over the last 12 months.

When flying from St. Louis to Arizona, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Fridays and the most expensive ones on Sundays.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Arizona, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Arizona, you should book around 3 weeks before departure, which saves you about 12% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$40
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 17% increase in price.
Flight from St. Louis to Phoenix Sky Harbor Airport

FAQs - booking Arizona flights

  • How does KAYAK find such low prices on flights from St. Louis to Arizona?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Arizona.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Arizona?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Arizona is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Arizona?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from St. Louis to Arizona with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Arizona?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from St. Louis to Arizona up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Arizona?

    The cheapest time of day to fly to Arizona is generally at night, when round-trip flights cost $360 on average. Morning departures are around 10% more expensive than evening flights, on average. The most expensive time of day to fly to Arizona is generally in the morning, which is peak travel time and where the average cost of a ticket is $434.

Top tips for finding cheap flights to Arizona

  • Looking for a cheap flight? 25% of our users found tickets from St. Louis to the following destinations at these prices or less: Las Vegas $113 one-way - $220 round-trip; Phoenix $158 one-way - $294 round-trip

Reviews of the top 5 airlines serving from St. Louis to Arizona

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Arizona. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Arizona? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4262 reviews
7.5Entertainment
8.6Crew
8.1Boarding
8.0Comfort
7.0Food
Airline reviews

The seats were comfortable, and the boarding process was pretty smooth.

10.0 ExcellentJohn, Jan 2026
BWI - MDW
Read more Southwest reviews

The seats were comfortable, and the boarding process was pretty smooth.

3 hour delay. Had to change plans and was still delayed.

The staff was very friendly, professional, and courteous. The overall flight was a great experience.

The crew canceled the complementary snack and drink in anticipation of turbulence that never materialized. I was counting on the drink (water) to take the the doses of medication - prescribed for my heart condition - that were due during the flight. Since no snack or meal was served on this flight, I cannot rate the food quality. Otherwise, this flight was excellent.

Departure was delayed more than 1/2 hour while we waited for luggage (only) transfer from another flight/plane. Once approved for takeoff, the flight was excellent.

We got exit row seats both flights. Everything was running on time

The flight crew was extremely rude and especially not helpful when our flight was delayed.

Pretty seamless, just a tad bit late in taking off and landing.

Flight was fine other than there was a gate change that I was not notified of. By chance I happened to check my phone and saw the change, otherwise, we would have missed our connecting flight.

Haven’t flown on SW in years. Flight was on time departing and arriving. Served vegan butter onion flavored pretzels which were bad. Coke served was in a tiny paper cup. Crew was not engaging. Felt like they were going through the motions. Old plane, tight seats and no leg room.

Probably not the fault of Delta but there was delay after delay after delay and I ended up getting home 4 hours later then I should have at 1:30 in the morning

No in flight service, no explanation - FC got service, C+ did not, unsure about Economy. No turbulence to speak of, so I guess another way to cut cost, or promote health and well being of Delta employees? Also, boarding in MEM combined zones, and with overhead space already full on both flights after Zone 2/ Diamond, presents a huge challenge to find a space for a bag. Delta, other than point A to B, is no longer reasonable to fly - very poor experiences, not even taking into account the chastising at the gate and rude crews, across the board.

It would have been better if the flight wasn't delayed by 2.5 hours

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

Delta flight Delay for ,more that two hours i.e original flight was 6.30 PM and it starts at 8.45 PM, When we connect Delta team for meal vouchers as it is late arrival in designation,But we did not get it as per delta policy , which is not good for mid night arrival,

Inexperienced boarding crew allowed too many bags on to a full flight and delayed takeoff causing a missed connection and unplanned overnight stay. There was a hotel at the airport but Delta would not pay for it offering only to shuttle me to an area hotel. Never even offerred so much as an apology by anyone working for Delta.

Staff was great! Kind and cordial! Middle seat row 28 seat B has a hump in it. Trays were getting stuck when putting down and up. Good flight

Departure was delayed resulting in me missing my connection. Delta did not autimatically find me another flight.

The seats weren’t reclining even though it wasn’t as exit seat

It was good because we traveled without luggage, carry on only.

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

The flight crew where really good. Better then the crew from BNE to SFO

Delayed, toilets did not flush, pilot parked to far away from Gate

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

left on time, reasonable boarding process arrived early luggage came out quickly

I like flying first class, and United has a nice one

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Check-in, boarding and the flight from Phoenix to Houston was quick and easy. The flight from Houston to Shreveport was delayed 5 hours. It was frustrating but I think United handled it the best they could.

Qatar airways ,boarding arrangements at Hamid international airport could been better

I love American. I’ll never fly anyone else if I can help it.

The flight was on time and arrived early. The crew were friendly and helpful.

Overall experience was great. Flights were almost on time in departing and we arrived at our destination as scheduled. No issues with amenities or flight crew. Everything went well as as expected. Will fly again with American Airlines in the future!

Boarding was organized and timely. Food was mediocre, especially for first class travel.

I bought wifi and most of the flight could not even use it my apps would just spin. I couldn't even listen to music. super frustrating.

AA delayed the flight for 3 hours and 50 minutes, but delayed the last 2 hours, 30 minutes at a time, so if we knew before, could have stayed at home and worked instead of being at the airport wasting time... The plane's crew was excellent, not their fault.

Liked that it was on time. Staff professional and friendly.

Things were delayed a little. But that didn’t affect my plans. It was fine. I was surprised it was so full thanksgiving day. The crew were friendly and professional.

Everything was good The connects, with no blame to crew. Or pilots. I understand they are short staffed. Everything went well for me. I'll be using you guys again in May if not sooner.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

Plane and crew on board were fine. Everything else was terrible.

The third party booking with cheapflightsfares was awful. Kayak should NOT partner with them. They sold me a bundle including seat selection and carry-on, but did not book the carry-ons with Frontier, so I’m out of pocket for $414 more while I await resolution.

This company socks. It's fraud. They canceled our flight yesterday, and today we were late because of a really long line at the check in bag. At the rebook station, there was ton of people. The workers were all rude. I am gonna make a report to FTC.

One of the worst travel experiences I've had. Had a flight scheduled with CVG to RSW on VLSWQX this morning departing at 5:30. Two individuals at the gate and one was in training. Not her fault but she didn't have the ability to check people in resulting in at least 15 families that didn't make it on the plane because they weren't checked into the system in time. When arriving at the airport to drop off our prepaid checked bags, the bag drop off agent asked if we could check our bags at the gate because of the long line. We said no problem so arrived at the gate by 5:00. They told those people that had previously paid for checked bags to stand off to the side while they let others that either didn't have a checked bag or their bag was already on the plan through. Realizing the gate workers had an issue, they either called for help or this lady showed up late for work as she didn't arrive until 5:15. The worker who had been there training the other individual and working diligently to make sure all passengers got on board. He even said that at one point all people that are currently in line are fine but asked the person in training to stand outside the ticketing area around 5:15 to notify any late travels that the flight was in boarding process and they arrrived too late. At that point, we're sill standing off to the side with our pre-paid checked bags patiently waiting. When the new lady arrived she couldn't have been more rude. It was an awful seen. Essentially they had asked for those without an assigned seat to board last, those with pre-paid checked bag stand off to the site and any traveling with a larger items that needed to be checked at the gate (such as a stroller), wait on the side. They realized that the flight needed to leave on time so the gate attendant shut the gate. So anyone without a seat assignment, those that had pre-checked bags, and the worst one I saw was a mother with two infant children was in line with use because she was asked to stand to the side because her stroller. When they shut the door to the plan they told her she could no longer get on. Her checked bags were already on the plane with her car keys in them, and the lady told her we couldn't accept anyone else on because the door was shut. She didn't even have a way to get home from the airport. Truely evil behavior. I've flown Frontier enough to know customer service is not a top priority in the company's mission, but this was an all-time low. I'm sending this after an 18 hour drive that our family just completed to Bonita Springs . I felt really bad for the lady being trained and the other individual trying to help, but when the new lady came to the gate she was truly one of the rudest individuals I've ever met. One lady had been there since 4am but because she didn't have an assigned seat they wouldn't let her on the plan.

Everything you need to know for your flight from St. Louis to Arizona

Information on your arrival and departure airports