Cheap Flights from Reading (RDG) to St. Louis (STL)

Popular airlines from Reading, PA (RDG-Reading Regional) to St. Louis Lambert Intl. Airport (STL)

Flights from Reading (RDG) to St. Louis (STL)
Origin airport
Reading Regional
Destination airport
Lambert-St. Louis Intl.
Distance
774 mi

Reading to St. Louis Flights

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

 

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

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

 

Frequently asked questions

How much does a flight from Reading, PA (RDG-Reading Regional) to Lambert-St. Louis Intl. Airport (STL) cost?
Secure a cheap one-way flight or cheap return flight from Reading, PA (RDG-Reading Regional) 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 Reading, PA (RDG-Reading Regional) to Lambert-St. Louis Intl. Airport (STL)?
Planning your getaway for may help you find better deals, as it's the cheapest month for flights between RDG and STL. You'll typically find the lowest fares during off-peak months.
Which airlines fly direct from Reading, PA (RDG-Reading Regional) to Lambert-St. Louis Intl. Airport (STL)?
While Reading, PA (RDG-Reading Regional) has no direct flights to Lambert-St. Louis Intl. Airport (STL), other airports have nonstop options. Flying from Philadelphia Intl. Airport (PHL) will get you to St. Louis without any layovers.
What is the cheapest airline that flies from Reading, PA (RDG-Reading Regional) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from RDG to STL, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Reading, PA (RDG-Reading Regional) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily direct flights available from Reading, PA (RDG-Reading Regional) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from RDG to STL?
Usually you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the airline, season 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 Reading, PA (RDG-Reading Regional) to Lambert-St. Louis Intl. Airport (STL)?
Book a flight from Reading, PA (RDG-Reading Regional) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the likelihood of delays and 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 Reading, PA (RDG-Reading Regional) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from RDG to STL shortly before your journey is generally more expensive. However, if you're flexible with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a RDG to STL flight and hotel package?
Booking a RDG to STL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Select from our impressive range of hotels and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Reading, PA (RDG-Reading Regional) to Lambert-St. Louis Intl. Airport (STL)?
In most instances, you can cancel or reschedule your RDG to STL flight. However, additional fees may apply, especially if you booked over 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like further details, head to our Customer Service portal.

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*Available to One Key members.