Find flights
When to book
FAQs & Tips
Airlines
Deals

Find cheap flights from Phoenix to St. Charles from $39

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Phoenix to St. Charles departing on 5/25. 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
0 bags
Mon 6/3
Mon 6/10

Search hundreds of travel sites at once for deals on flights from Phoenix Sky Harbor Intl Airport to St. Charles

In the last 7 days travelers have searched 43,369,418 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Good to know

Low season

February

High season

June

Cheapest flight

$39
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Phoenix to St. Louis

When to book flights from Phoenix to St. Charles

Are your dates flexible? Find out the best times to travel from Phoenix to St. Charles based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from Phoenix to St. Charles

  • Which airports will I be using when flying from Phoenix Sky Harbor Intl Airport to St. Charles?

    When flying out of Phoenix Sky Harbor Intl Airport you’ll be using Phoenix Sky Harbor Intl. St. Charles does not have its own airport so you’ll be flying into nearby Lambert-St Louis airport, which is 7.2 mi away.

  • How long does a flight from Phoenix Sky Harbor Intl Airport to St. Charles take?

    Direct flights cover the 1,258 miles separating Phoenix Sky Harbor Intl Airport and St. Charles in about 2h 54m.

  • How many flights are there between Phoenix Sky Harbor Intl Airport and St. Charles?

    16 direct flights run between Phoenix Sky Harbor Intl Airport and St. Charles on a daily basis. On average, there are about 113 departures each week.

  • What’s the cheapest day of the week to fly between Phoenix Sky Harbor Intl Airport and St. Charles?

    Consider leaving on a Saturday and avoid Fridays if you are looking for the best rates. For your return to Phoenix Sky Harbor Intl Airport, you’ll find the best rates on Saturdays and the most expensive ones on Thursdays.

  • How does KAYAK find such low prices on flights from Phoenix to St. Charles?

    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 Phoenix to St. Charles.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Charles from Phoenix 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 Phoenix to St. Charles?

    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 to St. Charles with an airline and back to Phoenix with another airline.

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

    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 to St. Charles from Phoenix up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Phoenix Sky Harbor Intl Airport to St. Charles?

    In the last 72 hours, the cheapest one-way ticket between Phoenix Sky Harbor Intl Airport and St. Charles found on KAYAK was with Frontier for $39. Frontier offered a round-trip connection from $114 and American Airlines from $141.

See more FAQs

Top tips for finding cheap flights from Phoenix Sky Harbor Intl Airport to St. Charles

  • There is no airport in St. Charles. Instead, you’ll be flying into St. Louis Lambert Airport when flying between Phoenix Sky Harbor Intl Airport and St. Charles.
  • The cheapest flight from Phoenix to St. Charles was found 63 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be November, December and January. The cheapest month to fly is May.
See more tips

Top 5 airlines serving Phoenix to St. Charles

 
Need help choosing which airline to fly with from Phoenix to St. Charles? 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
DeltaOverall score based on 10838 reviews
8.6Crew
8.2Boarding
7.9Comfort
8.0Entertainment
7.4Food
Airline reviews

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

10.0 ExcellentAllan, May 2024SUN - SLC
Read more about Delta reviews

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

Made the Atlanta to Pittsburgh trip many times, with Delta no issues

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

All flights were on time and boarding was issue free

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Water service would be great. The way they board is terrible. Slow passengers first😂😂 They need to smart up a bit

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

Crew were fine, drinks and snacks were as well but we were delayed for around 2 hrs which made our entry into Mexico delayed as well with the influx of arrivals at the same time. Sort of wasted our first day of vacation. We left Pittsburgh at 630am and did not arrive in Mexico until late dinner time.

American cancelled our flight home. Zero option for hotel, alternative transportation and took 3 hours to find our bags so we could take a 3 hour UBER ride home on our dime. Never flying AA again.

Re-checking our bags, the workers were not able to help us with boarding passes for the flight, told us to wait, then ignored us while they helped many other passengers. Until I got rude, they would have left us standing there, and even then they were very curt and dismissive in telling us where to get boarding passes printed. We made it to the gate just as they were starting to board passengers. It was just rude customer service.

While I received notice that AA 478 was delayed, the flight departed PHX and arrived PHL more than two hours late. The first class cabin service was mediocre; there were no pre-departure beverages offered; there were no warm mixed nuts served with cocktails; there was no personal greeting to me as an Executive Platinum member by the first class flight attendant. While the flight operated safely, its arrival at 0219 in the morning in PHL ended a very long day. I do not feel that American provided first class service.

Absolutely filthy flight and not equipped for a trans US

Turn on the heat. Flight was way too cold from Arizona to Chicago.

Poor on time performance. Flight was delayed due to a lightbulb. No updates from the pilot. Plane was dirty and hot, AC didn't work well.

Being back games on the in-flight entertainment. Also your flight attendants need a break, raise, or overall attitude adjustment.

Overall pleasant was delayed and caused transportation issue when landing

Good over all but my flight from. Miami to Barbados the airplane was very dirty like I have never seen before. It looked like that plane hasn’t been cleaned in a long time and I fly about one time a month.

Flight operated on tie. However, the in-flight entertainment was inoperative. No special recognition as an Executive Platinum member.

The crew was not great or professional. It seemed like they didn't really want to be there. A true lack of effort for accommodating customers.

Everything was really good but the seats are not very comfortable.

I paid for WiFi, but it (WiFi) was very very slow, will never take again! Impossible open Utube 😤😤😤

I had no legroom, although I paid for extra legroom. I could barely put my bag in front of my feet and under the seat. The Wi-Fi was horrible. In fact the flight attendant said that they had to reboot it and see if it was going to work and never did.

The guy with severe body odor sat next to me. For the whole duration of the flight it was a torture. The airline should have better policy on limiting people with bad body odor to board the flight. Passengers should not be the ones to endure bad odor for the whole duration of the flight. The airline should be e the one to ensure decent air quality for ever passenger.

Overall it was a miserable experience... I will never fly spirit for more than a 3 hour flight or overnight.

The boarding attendant was slightly rude when I asked about checking our stroller. Made me feel like I was bothering her.

My wife and I are both handicapped and at boarding they upgraded us to a seat closer to the front rather than all the way towards the back. Much appreciated.

Not much seat room, but that was unexpected. But the seat headrest was very uncomfortable.

First the good, everyone was friendly and efficient. Flight was smooth and plane was very clean and new. Now the bad, seats have almost no padding on your behind. I was in exit row so I had tons of leg room for a 6' 2" bean pole with long legs. Everything was extra - water, soda, snacks everything besides oxygen. Ya get what you pay for, and my flight was cheap as you could ever want it, so no worries.

Flight was a little late taking off. Seats are too upright, no ports to charge devices, no wifi, no entertainment

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

Flight was canceled with little warning. Flight was rebooked through Ontario, California and connecting flight was delayed by over three hours. Frontier is living up to their Greyhound of the skies reputation for sure.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight was OK. Seats were good no cell phone charges on the plane no TVs or entertainment.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

Flight cancelled and was told by a rude gate agent that they don’t accommodate on other airlines. Had to wait 5 hours for a connecting flight that had a 7 hour layover. Would not allow bags to be checked early so we couldn’t go through security .Had to rent a car for the afternoon to store bags and get a meal. Also incurred a hotel fee. No apology or reason given for the cancellation- just rudeness.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

Book cheap flights from Phoenix to St. Charles

Recent round-trip flight deals

5/18Sat
nonstopFrontier
2h 59mPHX-STL
5/20Mon
1 stopFrontier
6h 14mSTL-PHX
$114
5/22Wed
1 stopFrontier
12h 02mPHX-STL
5/29Wed
nonstopFrontier
3h 17mSTL-PHX
$124
5/8Wed
nonstopFrontier
2h 54mPHX-STL
5/11Sat
nonstopFrontier
3h 28mSTL-PHX
$128
7/31Wed
nonstopAmerican Airlines
3h 00mPHX-STL
8/7Wed
nonstopAmerican Airlines
3h 16mSTL-PHX
$141
7/31Wed
nonstopAmerican Airlines
3h 00mPHX-STL
8/7Wed
1 stopAmerican Airlines
7h 12mSTL-PHX
$150
5/23Thu
1 stopSpirit Airlines
26h 03mPHX-STL
5/27Mon
1 stopSpirit Airlines
20h 27mSTL-PHX
$160
6/21Fri
1 stopDelta
7h 55mPHX-STL
6/27Thu
1 stopDelta
7h 05mSTL-PHX
$216
5/25Sat
1 stopSpirit Airlines
8h 25mPHX-STL
5/26Sun
1 stopSpirit Airlines
8h 40mSTL-PHX
$224
6/21Fri
1 stopDelta
5h 21mPHX-STL
6/25Tue
1 stopDelta
6h 44mSTL-PHX
$238
7/31Wed
2 stopsUnited Airlines
14h 11mPHX-STL
8/7Wed
1 stopUnited Airlines
6h 30mSTL-PHX
$425

Search by stops

Search by airline

Search by price

Recent one-way flight deals

5/25Sat
nonstopFrontier
2h 59mPHX-STL
$39
5/21Tue
1 stopSpirit Airlines
21h 21mPHX-STL
$43
5/26Sun
nonstopAmerican Airlines
3h 00mPHX-STL
$71
5/22Wed
nonstopAmerican Airlines
3h 00mPHX-STL
$81
6/6Thu
1 stopDelta
5h 28mPHX-STL
$108
5/24Fri
1 stopDelta
5h 15mPHX-STL
$130
5/23Thu
2 stops
27h 59mPHX-STL
$165
6/6Thu
3 stops
27h 21mPHX-STL
$178
5/25Sat
2 stopsUnited Airlines
20h 07mPHX-STL
$268
8/3Sat
2 stopsUnited Airlines
14h 20mPHX-STL
$308

Search by stops

Search by airline

Search by price

Last minute flights from Phoenix to St. Charles

Last minute flight, train and bus deals

5/8Wed
nonstopFrontier
2h 54mPHX-STL
5/11Sat
nonstopFrontier
3h 28mSTL-PHX
$128
5/8Wed
nonstopFrontier
2h 54mPHX-STL
5/13Mon
nonstopFrontier
3h 28mSTL-PHX
$138
5/8Wed
nonstopFrontier
2h 54mPHX-STL
5/11Sat
multi-stopFrontier
12h 13mSTL-PHX
$184
5/8Wed
multi-stopDelta
5h 47mPHX-STL
5/11Sat
multi-stopDelta
7h 03mSTL-PHX
$270
5/8Wed
multi-stopAmerican Airlines
6h 54mPHX-STL
5/11Sat
nonstopAmerican Airlines
3h 21mSTL-PHX
$289
5/9Thu
multi-stopAmerican Airlines
7h 28mPHX-STL
5/9Thu
nonstopAmerican Airlines
3h 24mSTL-PHX
$313
5/9Thu
multi-stop
24h 19mPHX-STL
5/11Sat
multi-stop
23h 58mSTL-PHX
$443
5/8Wed
multi-stop
31h 41mPHX-STL
5/13Mon
multi-stop
26h 39mSTL-PHX
$460
5/9Thu
multi-stopSpirit Airlines
30h 34mPHX-STL
5/11Sat
multi-stopSpirit Airlines
26h 12mSTL-PHX
$535
5/9Thu
multi-stopSpirit Airlines
8h 49mPHX-STL
5/9Thu
multi-stopSpirit Airlines
22h 20mSTL-PHX
$597

Search by stops

Search by airline

Search by price

Flights to St. Charles