$44 Cheap Flights to St. Charles, IL

Popular airlines to St. Charles

How much is the cheapest flight to St. Charles?

Prices were available within the past 7 days and start at $44 for one-way flights and $83 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Spirit Airlines
Delta
JetBlue Airways
United

Find the cheapest month to fly from Columbus (CMH) to Chicago (ORD)

June is typically the cheapest month to fly

From $77 - $307 per traveler.

Graph displaying average flight prices per month

Tips to find the cheapest flights to St. Charles

The cheapest day to fly

Get started finding a cheap flight to St. Charles on Expedia by either choosing a deal on this page or entering into the search bar your travel dates, origin airport, and whether you want roundtrip or one-way airfare. You can filter for flexibility, number of stops, airline, and departure/arrival times to find the best flight for you.

The cheapest month to fly

September is the cheapest month to fly to St. Charles. This coincides with the low season when fewer people travel. Whichever month you travel in, though, be sure to book at least a month in advance if you want to score cheap tickets to St. Charles. ARC's data shows that domestic flights booked 28 days or more before departure are typically 24% cheaper than those booked last minute.

The most affordable time to book a flight

Typically, a Sunday can be the cheapest time to book a flight to St. Charles, according to ARC’s data. On average, you could save between 6% and 13% by booking on a Sunday instead of a Friday, which is the most expensive day to make a reservation.

The cheapest round-trip tickets to St. Charles

The lowest price for round-trip flights to St. Charles in 2025 starts from from $83, while one-way tickets start from from $44. Expedia's effective search tool is one of the best ways to find a budget airfare. Simply enter your dates, and within seconds, it'll show you a vast selection of the cheapest flights to St. Charles. If you have a preferred departure time or airline, you can use the handy filters to customize your search.

The cheapest airlines flying to St. Charles

Frontier Airlines, Spirit Airlines, Delta, American Airlines, JetBlue Airways, United are just some of the airlines that can typically offer cheap tickets to St. Charles. You can find their most affordable flights by using the “airline” search filter and then sorting prices from low to high. As a trusted partner of the world's leading airlines, Expedia offers you some of the best airfare deals to St. Charles and countless more destinations worldwide.

The most affordable airports to fly into

To view the cheapest airports to fly into for St. Charles, simply order your search results from lowest to highest price. Expedia's search tool compares flight prices for all airports close to your destination, so you don't have to manually search them one by one to find the cheapest flight to St. Charles. If you have a preferred place to fly into, take advantage of the “arrival airport” filter to narrow down your search on Expedia.

Save with a package

With Expedia's amazing package deals, you could save hundreds of dollars by booking your St. Charles plane tickets together with your accommodations, car rental, or activities. Just select the search wizard's “package” option to view some of the cheapest deals. Look out for the green savings label to see how much you're saving.

Date flexibility for the cheapest flights to St. Charles

If you can be flexible with your travel dates, it's a good idea to broaden your search by comparing prices on different days. This will open up more options, meaning you could uncover a less expensive flight to St. Charles.

Stopover savings

The cheapest tickets to St. Charles are sometimes those with a stopover. Book one of these flights, and you'll change planes at an airport en route to St. Charles. While the overall travel time might be longer than a non-stop flight, you may decide it's worth it for the money saved.

Get Expedia's Price Drop Protection

Price Drop Protection means that if your flight gets cheaper after booking, you'll be credited the difference*. This gives you peace of mind that you're getting one of the cheapest flights to St. Charles for your chosen departure. Expedia's Price Drop Protection is available for a small fee but is free to One Key Gold and Platinum tier members.

*Terms apply.

Use our Price Tracking feature

Expedia's Price Tracking feature is another great tool that removes the guesswork from finding cheap flights to St. Charles. Simply download the free Expedia app to your smart device and activate St. Charles flight price alerts for your travel dates. There's even a price predictor tool that uses historical data to indicate the best time to book, giving you peace of mind that you'll nab the lowest prices.

Book with Expedia

As well as Price Drop Protection and Price Tracking, Expedia's close partnership with a vast selection of the world's leading airlines means you're sure to find cheap flights to St. Charles. Plus, the One Key rewards program lets you earn real cash rewards on most bookings that you can use to save money on future trips. Best of all, it's free to join, and members often unlock exclusive discounts, too.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

What month is the cheapest to fly to St. Charles?
Flights to St. Charles are usually the least expensive in October *. You may be able to land a good deal for fares during this month if you keep an eye out. *Cheapest month to fly is based on the month with the cheapest flight found on Expedia.com in the next 330 days.
Which US cities have the cheapest flights to St. Charles?
New York, Washington and Dallas generally have cheap flights to St. Charles. Bear in mind that fares may vary based on factors such as time of year, number of stopovers and demand.
Which US cities fly direct to St. Charles?
Take your pick of 150 US destinations offering direct flights to St. Charles. When booking on Expedia, check "Direct flights only" to find nonstop routes. Fly to St. Charles from any of these top cities:

  • New York
  • Washington
  • Dallas
  • Boston
  • Phoenix

How to find a cheap flight to St. Charles?
Book early to increase your chances of finding cheap flights to St. Charles. Also, consider visiting during off-season months like January and March. If you fly on a Thursday, you'll save an average of 16% compared to those departing on a Sunday.* Save time checking every day and create a price alert on the Expedia app. We'll let you know when fares change.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
How to get a cheap last-minute flight to St. Charles?
Staying flexible with your plans can help you to find last-minute deals on cheap flights to St. Charles. To view all the available options, consider exploring different ticket types, tweaking your St. Charles vacation dates, flying out of an alternative airport or going with another carrier.
How far in advance should I book a flight to St. Charles?
Find the travel dates you want and a fare your budget will love by booking your domestic flight to St. Charles up to 28 days in advance. Lock in tickets two to four months ahead if you're visiting St. Charles from an international destination.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which day of the week is the cheapest day to buy a plane ticket to St. Charles?
You can save an average of 8% if you purchase plane tickets on a Sunday rather than Fridays, which tend to be the most expensive day to book.* When it comes to getting a cheap flight to St. Charles, it's all about timing.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which airlines fly to St. Charles?
There are 44 carriers connecting St. Charles with 216 airports all over the world. The chief gateway to this city is O'Hare Intl. Airport (ORD). Travel with any of these leading airlines to St. Charles:

  • United Airlines
  • American Airlines
  • Delta Air Lines
  • Alaska Airlines

Where do you fly into St. Charles?
St. Charles's main point of arrival is O'Hare Intl. Airport (ORD). If you're looking for more nearby choices when flying to St. Charles, consider Lewis University Airport (LOT), Midway Intl. Airport (MDW) or Rockford, IL (RFD-Greater Rockford). You can also opt to fly to St. Charles through Dupage Airport (DPA).
How far is the airport from central St. Charles?
Arriving at O'Hare Intl. Airport (ORD) puts you roughly 20 mi east of the center of St. Charles.
Can I save money by booking a St. Charles trip package?
You could potentially save hundreds of dollars if you lock in a St. Charles flight and hotel package deal on Expedia. And you'll make life easier by having all your travel plans in one place. Try bundling your flight and hotel with add-ons like tours and car rentals for your own personalized St. Charles break.
Can I change or cancel my flight to St. Charles?
It's often possible to change or cancel your flight to St. Charles. Many airlines allow you to cancel your flight for free within 24 hours of booking. However, some flights are non-refundable, and airlines may offer you credit for a future flight in place of a direct refund. To reserve cheap flights to St. Charles with flexible change policies, pick the "No cancel fee" or "Changes included" filters during your search. Want more details? Head to our Customer Service Portal.
Flights to St. Charles information
Destination airport
Midway Intl.
Destination airport IATA code
MDW
Destination city name
Chicago
Roundtrip price
$82

Trending flights to St. Charles

Prices were available within the past 7 days and start at $44 for one-way flights and $83 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines

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*Available to One Key members.