Cheap Flights from Rochester (ROC) to St. Louis (CPS)

Popular airlines from Greater Rochester Intl. Airport (ROC) to St. Louis, MO (CPS-St. Louis Downtown)

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Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $360
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $360

Frequently asked questions

How much does a flight from Greater Rochester Intl. Airport (ROC) to St. Louis Downtown Airport (CPS) cost?
Get a cheap one-way flight or cheap return flight from Greater Rochester Intl. Airport (ROC) to St. Louis Downtown Airport (CPS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Greater Rochester Intl. Airport (ROC) to St. Louis Downtown Airport (CPS)?
is the least expensive month to fly from ROC to CPS. Avoiding peak travel times is often the key to finding better fares.
What is the cheapest airline that flies from Greater Rochester Intl. Airport (ROC) to St. Louis Downtown Airport (CPS)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from ROC to CPS. Then, sort your results by "Price (lowest to highest)" to pick up a great deal.
How many flights per day from Greater Rochester Intl. Airport (ROC) to St. Louis Downtown Airport (CPS)?
There are no daily direct flights available from Greater Rochester Intl. Airport (ROC) to St. Louis Downtown Airport (CPS). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from ROC to CPS?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the season, 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 Greater Rochester Intl. Airport (ROC) to St. Louis Downtown Airport (CPS)?
To avoid possible delays on the Greater Rochester Intl. Airport (ROC) to St. Louis Downtown Airport (CPS) route, travel before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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 Greater Rochester Intl. Airport (ROC) to St. Louis Downtown Airport (CPS) last-minute?
Booking your ticket from ROC to CPS right before your journey is generally more expensive. But if you're flexible with your schedule, you could land a cheap last-minute fare.
Is it cheaper to book a ROC to CPS flight and hotel package?
Compared with arranging flights and hotels separately, booking a ROC to CPS flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one convenient place takes the hassle out of planning your trip. Just pick your flights and select from our wide range of stays, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Greater Rochester Intl. Airport (ROC) to St. Louis Downtown Airport (CPS)?
If you reserved your ROC to CPS flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Greater Rochester Intl.
Destination airport
St. Louis Downtown
Distance
723 mi

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Rochester to St. Louis Flights

The cheapest times to fly from Rochester 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 Rochester to St. Louis are during the month of . You can find some of the cheapest flights from Rochester to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Rochester 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 Rochester 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 Rochester 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 Rochester 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 Rochester 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.

 

Rochester to St. Louis Flights

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