$69 Cheap Flights from Rockford (RFD) to St. Louis (STL)

View $69 flight on Wed, Dec 31, 2025Opens in a new window

Popular airlines from Rockford, IL (RFD-Greater Rockford) to St. Louis Lambert Intl. Airport (STL)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Rockford to St. Louis (RFD-STL)

Prices were available within the past 7 days and start at $69 for one-way flights and $138 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Jan 28 - Mon, Feb 2
RFD
Rockford
STL
St. Louis
$138 Roundtrip, found 1 day ago
$138
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Jan 28 from Rockford to St. Louis, returning Mon, Feb 2, priced at $138 found 1 day ago
American Airlines
Sat, Dec 6 - Tue, Dec 9
RFD
Rockford
STL
St. Louis
$154 Roundtrip, found 7 hours ago
$154
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Sat, Dec 6 from Rockford to St. Louis, returning Tue, Dec 9, priced at $154 found 7 hours ago
American Airlines
Wed, Nov 19 - Mon, Nov 24
RFD
Rockford
STL
St. Louis
$186 Roundtrip, found 3 days ago
$186
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Nov 19 from Rockford to St. Louis, returning Mon, Nov 24, priced at $186 found 3 days ago
American Airlines
Wed, Jan 14 - Thu, Jan 15
RFD
Rockford
STL
St. Louis
$196 Roundtrip, found 17 hours ago
$196
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Wed, Jan 14 from Rockford to St. Louis, returning Thu, Jan 15, priced at $196 found 17 hours ago
American Airlines
Wed, Jan 28 - Mon, Feb 2
RFD
Rockford
STL
St. Louis
$197 Roundtrip, found 1 day ago
$197
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Jan 28 from Rockford to St. Louis, returning Mon, Feb 2, priced at $197 found 1 day ago
American Airlines
Sat, Dec 6 - Tue, Dec 9
RFD
Rockford
STL
St. Louis
$211 Roundtrip, found 3 days ago
$211
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, Dec 6 from Rockford to St. Louis, returning Tue, Dec 9, priced at $211 found 3 days ago
American Airlines
Mon, Nov 24 - Thu, Nov 27
RFD
Rockford
STL
St. Louis
$212 Roundtrip, found 1 day ago
$212
Roundtrip
found 1 day ago
Select American Airlines flight, departing Mon, Nov 24 from Rockford to St. Louis, returning Thu, Nov 27, priced at $212 found 1 day ago
American Airlines
Sat, Dec 6 - Tue, Dec 9
RFD
Rockford
STL
St. Louis
$213 Roundtrip, found 7 hours ago
$213
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Sat, Dec 6 from Rockford to St. Louis, returning Tue, Dec 9, priced at $213 found 7 hours ago
American Airlines
Wed, Dec 31 - Sun, Jan 4
RFD
Rockford
STL
St. Louis
$225 Roundtrip, found 2 hours ago
$225
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, Dec 31 from Rockford to St. Louis, returning Sun, Jan 4, priced at $225 found 2 hours ago
American Airlines
Sat, Dec 6 - Sun, Dec 7
RFD
Rockford
STL
St. Louis
$226 Roundtrip, found 3 days ago
$226
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, Dec 6 from Rockford to St. Louis, returning Sun, Dec 7, priced at $226 found 3 days ago

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 $413
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $413

Frequently asked questions

How much does a flight from Rockford, IL (RFD-Greater Rockford) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight from $69 or cheap return flight from $138 from Rockford, IL (RFD-Greater Rockford) to Lambert-St. Louis Intl. Airport (STL) 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 Rockford, IL (RFD-Greater Rockford) to Lambert-St. Louis Intl. Airport (STL)?
January is the most affordable month to fly from RFD to STL. Planning your trip for the off-season is often the key to finding a great deal.
What is the cheapest airline that flies from Rockford, IL (RFD-Greater Rockford) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline flying from RFD to STL, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Rockford, IL (RFD-Greater Rockford) to Lambert-St. Louis Intl. Airport (STL)?
There are no daily direct flights departing from Rockford, IL (RFD-Greater Rockford) to Lambert-St. Louis Intl. Airport (STL). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from RFD to STL?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Rockford, IL (RFD-Greater Rockford) to Lambert-St. Louis Intl. Airport (STL)?
Select a flight from Rockford, IL (RFD-Greater Rockford) to Lambert-St. Louis Intl. Airport (STL) that takes off before 3 PM to reduce the risk of cancellations. Departures after this hour are on average 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 Rockford, IL (RFD-Greater Rockford) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until just before your departure to book your flight from RFD to STL generally means paying more. While you might find some last-minute offers, they aren't always guaranteed. Be flexible with your travel plans for a better chance of snagging a bargain.
Is it cheaper to book a RFD to STL flight and hotel package?
You'll generally save money by booking a RFD to STL flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. Once you've chosen your ideal flights and accommodations, consider adding extras including car rentals, activities and tours.
Can I cancel or change the date of my flight from Rockford, IL (RFD-Greater Rockford) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your RFD to STL flight within the last 24 hours, you may be able to cancel or modify it without any fees. 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, visit our Customer Service portal if you want more information.

Travel information

Origin airport
Greater Rockford
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines
Roundtrip price
$137
Distance
248 mi

Book with confidence

Rockford to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Rockford 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 Rockford 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 Rockford to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $69 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 Rockford 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 Rockford 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.

 

Rockford to St. Louis Flights

Explore a world of travel with Expedia

*Available to One Key members.