$52 Find Cheap Flights to St. Charles - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Charles departing on 10/20. 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

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Everything you should know

Cheapest round-trip
$99
Typical prices: $251-$458
Frontier
Tue 9/8Sat 9/12
PHL - STL • 1 stop
Cheapest non-stop
$122
Typical prices: $137-$339
Frontier
Sun 8/9Thu 8/13
DFW - STL • Non-stop
Arrival airport
You can't fly directly to St. Charles. It is served by St. Louis (STL), located 7.2 miles from St. Charles.
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We hope you love your trip to St. Charles!
Flight Deals
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Flight Deals

Cheap Flights to St. Charles

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights to St. Charles 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 to St. Charles

Tue, Sep 8 - Sat, Sep 12
Frontier Logo
4:45 pm - 9:40 am
PHL
-
STL
17h 55m
1 stop
Frontier Logo
10:35 am - 6:15 pm
STL
-
PHL
6h 40m
1 stop
$99Frontier
Tue, Sep 22 - Sat, Sep 26
Frontier Logo
12:43 pm - 9:40 am
PHL
-
STL
21h 57m
1 stop
Frontier Logo
10:35 am - 6:15 pm
STL
-
PHL
6h 40m
1 stop
$101Frontier
Thu, Aug 13 - Mon, Aug 17
Delta Logo
1:30 pm - 8:31 pm
DCA
-
STL
8h 01m
1 stop
Delta Logo
6:25 pm - 10:59 pm
STL
-
DCA
3h 34m
1 stop
$257Delta
Wed, Aug 12 - Thu, Aug 13
United Airlines Logo
8:20 am - 12:02 pm
IAD
-
STL
4h 42m
1 stop
United Airlines Logo
8:00 am - 1:55 pm
STL
-
IAD
4h 55m
1 stop
$257United Airlines
Wed, Aug 19 - Wed, Aug 26
Southwest Logo
7:25 am - 2:25 pm
DCA
-
STL
8h 00m
2 stops
Southwest Logo
10:15 am - 3:50 pm
STL
-
DCA
4h 35m
1 stop
$262Southwest
Thu, Aug 13 - Sat, Aug 15
Southwest Logo
6:50 pm - 8:00 pm
DCA
-
STL
2h 10mnonstop
Southwest Logo
7:50 am - 12:30 pm
STL
-
DCA
3h 40m
1 stop
$263Southwest
Wed, Aug 12 - Thu, Aug 13
United Airlines Logo
8:25 am - 9:39 am
IAD
-
STL
2h 14mnonstop
United Airlines Logo
9:30 am - 4:02 pm
STL
-
IAD
5h 32m
1 stop
$263United Airlines
Wed, Sep 2 - Wed, Sep 9
American Airlines Logo
7:59 pm - 9:28 pm
DCA
-
STL
2h 29mnonstop
American Airlines Logo
5:13 pm - 8:19 pm
STL
-
DCA
2h 06mnonstop
$268American Airlines
Thu, Aug 13 - Mon, Aug 17
Delta Logo
6:30 am - 8:08 am
LGA
-
STL
2h 38mnonstop
Delta Logo
2:10 pm - 7:47 pm
STL
-
LGA
4h 37m
1 stop
$304Delta
Sat, Sep 5 - Mon, Sep 7
American Airlines Logo
7:10 pm - 8:59 pm
LGA
-
STL
2h 49mnonstop
American Airlines Logo
6:00 am - 9:29 am
STL
-
LGA
2h 29mnonstop
$307American Airlines
Useful Info

Good to know - Book Cheap St. Charles Plane Tickets

Low season

January

Cheapest flight

$52
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Dallas to St. Louis

Flights to St. Charles: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew to St. Charles 
DeidreFlew with Alaska Airlines
PDX
-
STL
Jun 2026
At PDX, the Alaska Airlines section is large and confusing, especially for older people needing assistance. So arrive at the airport quite early. The staff at the airport also need to remember that the newly remodeled space is unfamiliar to many passengers.
WaleFlew with United Airlines
IAH
-
STL
Dec 2025
Make sure your electronics are charged before boarding, the plane doesn’t have power outlets
Verified travelerFlew with Alaska Airlines
SEA
-
STL
Jul 2025
Give yourself extra time. Love the self check in options.
LarryFlew with Southwest
LAX
-
STL
Apr 2024
For long flights on airlines built for short flights (SWA) anyone over 5’ 10” is going to get cramped. Consider an Economy Plus upgrade when available.
Verified travelerFlew with Alaska Airlines
SEA
-
STL
Feb 2024
Be sure to measure your wheels for carry on my luggage was the correct size but the wheels made it over so had to check my bag wasn't happy about that since you have to pay for checked should at least get one free.

FAQs - booking St. Charles flights

  • How long is the flight to St. Charles?

    Flights from Boston2h 50m
    Flights from Atlanta1h 37m
    Flights from Denver1h 56m
    Flights from New York4h 24m
    Flights from Los Angeles3h 30m
  • What is the cheapest flight to St. Louis?

    In the last 5 days, the cheapest flight deal to St. Louis was found on the route from Dallas, at $99 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $300 in the last 5 days.

  • Which airlines fly to St. Louis?

    Many airlines fly to St. Louis, the most common ones being Southwest, American Airlines, and United Airlines. See the amount of flights per week for popular airlines flying to St. Louis.

  • How to fly to St. Charles?

    You cannot fly directly to St. Charles. KAYAK recommends you fly to Lambert-St Louis (STL) (7.16 miles from St. Charles). From there you can rent a car or get a taxi.

  • What airports are near St. Charles?

    The closest airport is Lambert-St Louis (STL) (7.16 mi). Other nearby airports are Springfield Capital (SPI) (85 mi) or Columbia Regional (COU) (92.78 mi). KAYAK recommends you fly to Lambert-St Louis.

  • How far is Lambert-St Louis Airport from central St. Louis?

    You’ll need to travel 13 miles to reach the St. Louis city center from Lambert-St Louis Airport.

  • What is the name of St. Louis’s airport?

    All flights to St. Louis land at Lambert-St Louis Airport. The airport code is STL,and it can also be referred to as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl.

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

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

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

  • What is the Hacker Fare option on flights 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 with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight 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 up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to St. Charles

  • There is no major airport in St. Charles. It is instead served by Lambert-St Louis Airport.
  • Looking for cheap airfare to St. Charles? 25% of our users found round-trip tickets to St. Charles for the following prices or less: From Fort Lauderdale $284, from Los Angeles $292, from Miami $364
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Charles flight deals.

Reviews of the top 5 airlines flying to St. Charles

 
Need help choosing which airline to fly with from the United States 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
SouthwestOverall score based on 4238 reviews
7.5Entertainment
8.0Comfort
8.1Boarding
8.6Crew
7.0Food
Airline reviews

Great job! My family doesnt fly often but we felt safe 100%

10.0 ExcellentK, Jun 2026
AUS - MCI
Read more Southwest reviews

Great job! My family doesnt fly often but we felt safe 100%

Communication about the delayed flight was poor. We were told to move gates three times but that was bad information. We went from gate 128 to gate 126 and then to gate 123 and back to gate 126. Communication about the delay was bad. Ended up being 1 1/2 hour late getting home.

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

I have not flown Southwest in awhile and had a very pleasant experience. From ticketing to boarding to the flight. The flight left on time and landed ahead of schedule. It won't be so long next time!!

Everything went smoothly and we even arrived a little bit early.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

Southwest's seats are the least comfortable I have ever sat in.

It was one and half hour late... Not sure if any other experience matters.

For my birthday trip this was my second time ever flying, this trip was the best.

This flight was originally delayed by ~45 minutes; which is fine. However, there were additional delays due to late offboarding of the prior flight, unclear issues with the boarding process, delays on the tarmac, and exceptionally long taxiing. None of these issues were communicated proactively. Additionally, the flight had exceptionally rough turbulence, which led to a very uncomfortable flight and no traditional beverage service. Again, this is understandable, but it was not communicated up-front by the flight team.

My flight was canceled, and instead of rebooking me on a non-stop first-class flight for the same day, which I originally had, Delta rebooked me on a one-stop flight for the following day. When I checked the Delta app, I noticed that there were available flights for both the same day and the next day. I believe this indicates poor management on their part.

The Columbus-based WestJet crews that cover Delta commuter flights between LGA and CMH are excellent - this team included. Our flight today landed 40 minutes early, which is unheard of when flying out of LaGuardia. I've flown with the same crew in more challenging conditions, and they always rise to the occasion with helpful communication to the passengers so that we may manage expectations.

We departed early and made up time in the air allowing us to arrive 30 minutes early. Capt was incredibly genuine and thanked every passenger for flying with Delta. Completely humble and professional!

The boarding process needs to be refined. Sometimes the gate crew calls out the zones and then flip to showing the.zones boarding on the gate monitor display. So, unless you are huddled around the gate lanes watching the monitor, you could miss your boarding zone. Suggest the zones be announced each time a new zone is allowed to board.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

On 2 different flights the wifi was horrible and there was no drink or snack service.

There was no FREE wi-fi nor entertainment screens at all.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

As we lined up to board they gave our plane to a flight going to Newark. So then we got delayed until they could find another plane. Flight crew was ok. I’m assuming since it’s a shorter flight they only offered water and coffee.

I would have preferred a flight voucher and to hop on a different flight. Delayed over 6 hours.

Flight was delayed “due to earlier delays of that plane”, so we were nearly three hours late.

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

Airport terminal was outdated, flight was on a small jet with no wifi

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

Short flight - no food understandable. Flight was delayed for over an hour. Overall, it was good.

We boarded and buckled and then deplaned due to no pilot. Had to wait over 3 hours for a new pilot. Not weather related, just poor management.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Improvements in communication and empathy are absolutely necessary for American Airlines staff (top down). It’s like they are numb to the needs of their customers.

I had a TERRIBLE experience with the AA crew. I believe it was disability-related. It’s unlikely I will fly AA again.

I like the speed of boarding and deplaning and the fact that everything was on time. The crew (attendants) were probably quite new and did not begin the in cabin service until 30 min before landing even though there was little to no air turbulence for the last 1.5 hours of the flight. It made for a mad scramble at the end to get trash collected and carts stowed before touch down.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

Flight delayed, boarding time kept changing, not good. Nee firm information given each time.

Tiny seats, no entertainment, no amenities, delays, they charge for carry on and their allowed personal item is smaller than in other airlines.

The seats are tiny and they don’t recline. The planes are dirty and very small. You have to pay for carry on and even the personal item that you’re allowed is smaller than with other airlines. Flights are usually delayed and there’s no screens or any amenities or entertainment.

Flight was delayed but it was very smooth. Crew was very nice. Seats are uncomfortable but ok.

Flight was delayed and then my second leg was completely canceled. Had to get a refund

The flight was great . But you only had one vegan item on the whole flight and someone prior to me took it . I was so disappointed cause I came in from the flooded area and couldn’t pick up anything prior to my flight .

I really didn't like anything. Paid for my checked luggage online ($79) and then was told that I would have to paid another $79 for my carry on. Was not allowed to enter the terminal until 3 hours before my flight and when I finally was allowed to check my bag and enter, my flight was delayed 3 times. When I finally landed, we were all instructed to "run off the plane" as they had to do a quick turn around to Las Vegas. Me and several of my flying companions will never fly Frontier again.

I paid for the upgraded bundle. Was worth it! Great experience round trip!

It was awful everything about it terrible I will never ever ever ride it again

It was awful ....my first time flying on it and I will NEVER fly it again ....everything about it was terrible .....most especially the flight attendants

The experience was terrible. The flight boarded late, then after leaving the gate the plane had had to return to the gate for fuel. After 2 hours on the plane, the flight was canceled. The reasons given for the cancelation didn't sound truthful. and different reasons were given. My 15 year old daughter was flying alone on this flight. When they all disembarked the plane she kept asking the crew what she was supposed to do. No one even gave her the courtesy of a response. No one. It took another 4.75 hrs to be out of customs and baggage. She was re-booked the following day. That flight departed 2 hours late. After all of that, they offered a measly $100 flight voucher with an expiry date of 3 months! All in all a terrible experience. We won't be using Frontier again in the future.

Everything you need to know for your flight to St. Charles