$796 Cheap Flights from St. Louis (STL) to Patna (PAT)

View $796 flight on Sun, Oct 19, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Patna (PAT)

Cheap Flights from St. Louis to Patna (STL-PAT)

Prices were available within the past 7 days and start at $796 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Patna Airport (PAT) cost?
Snag a cheap one-way flight from $796 or cheap return flight from Lambert-St. Louis Intl. Airport (STL) to Patna Airport (PAT) 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 Lambert-St. Louis Intl. Airport (STL) to Patna Airport (PAT)?
Planning your getaway for can help you save, as it's the cheapest month for flights between STL and PAT. You'll often find the lowest prices during off-peak months.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Patna Airport (PAT)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest STL to PAT flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Patna Airport (PAT)?
You'll need to take a flight with a layover when traveling from Lambert-St. Louis Intl. Airport (STL) to Patna Airport (PAT). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from STL to PAT?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Patna Airport (PAT)?
To avoid possible delays on the Lambert-St. Louis Intl. Airport (STL) to Patna Airport (PAT) route, travel before 3 PM. Later departures have a 22% higher chance of being 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 Lambert-St. Louis Intl. Airport (STL) to Patna Airport (PAT) last-minute?
Last-minute fares from STL to PAT are generally more expensive. For the cheapest rates, start searching for flights early. That being said, if you're flexible with your travel plans, you may find a cheap fare just before your departure.
Is it cheaper to book a STL to PAT flight and hotel package?
Opting for a STL to PAT flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our wide range of hotels and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Patna Airport (PAT)?
If you booked your STL to PAT flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Patna
Distance
7981 mi

Book with confidence

St. Louis to Patna Flights

The cheapest times to fly from St. Louis to Patna

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

 

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

Sunday is one of the best days to book for cheap flights from St. Louis to Patna: 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 St. Louis to Patna

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 St. Louis to Patna in 2025. You can also book with separate airlines for your outbound and return journeys, from $796 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 St. Louis to Patna 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 St. Louis to Patna 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.

 

St. Louis to Patna Flights

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*Available to One Key members.