Cheap Flights from Belleville (BLV) to St. Louis (CPS)

Popular airlines from Belleville, IL (BLV-MidAmerica-St. Louis) to St. Louis, MO (CPS-St. Louis Downtown)

Frequently asked questions

How much does a flight from MidAmerica-St. Louis Airport (BLV) to St. Louis Downtown Airport (CPS) cost?
Lock in a cheap one-way flight or cheap return flight from MidAmerica-St. Louis Airport (BLV) to St. Louis Downtown Airport (CPS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from MidAmerica-St. Louis Airport (BLV) to St. Louis Downtown Airport (CPS)?
is the cheapest month to fly from BLV to CPS. Traveling outside of peak seasons is often the key to landing a great deal.
What is the cheapest airline that flies from MidAmerica-St. Louis Airport (BLV) to St. Louis Downtown Airport (CPS)?
To find the cheapest airline flying from BLV to CPS, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from MidAmerica-St. Louis Airport (BLV) to St. Louis Downtown Airport (CPS)?
Nonstop flights from MidAmerica-St. Louis Airport (BLV) to St. Louis Downtown Airport (CPS) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BLV to CPS?
Typically you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from MidAmerica-St. Louis Airport (BLV) to St. Louis Downtown Airport (CPS)?
To avoid potential delays on the MidAmerica-St. Louis Airport (BLV) to St. Louis Downtown Airport (CPS) route, travel before 3 PM. Departures after this hour are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from MidAmerica-St. Louis Airport (BLV) to St. Louis Downtown Airport (CPS) last-minute?
Last-minute fares from BLV to CPS are usually more expensive. To lock in the lowest rates, start looking for flights early. That being said, if your travel plans are flexible, you may score a cheap fare just before your departure.
Is it cheaper to book a BLV to CPS flight and hotel package?
Compared with arranging hotels and flights separately, booking a BLV to CPS flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one convenient place will take the stress out of planning your trip. Just pick your flights and select from our wide range of stays, then tailor your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from MidAmerica-St. Louis Airport (BLV) to St. Louis Downtown Airport (CPS)?
It's usually possible to reschedule or cancel your BLV to CPS flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
MidAmerica-St. Louis
Destination airport
St. Louis Downtown
Distance
18 mi

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Belleville to St. Louis Flights

The cheapest times to fly from Belleville to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Belleville to St. Louis are during the month of . You can find some of the cheapest flights from Belleville to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Belleville to St. Louis

Sunday is one of the best days to book for cheap flights from Belleville to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Belleville to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Belleville to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Belleville to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Belleville to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

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

 

Belleville to St. Louis Flights

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*Available to One Key members.