Cheap Flights from Niagara Falls (IAG) to St. Louis (STL)

Popular airlines from Niagara Falls, NY (IAG-Niagara Falls Intl.) to St. Louis Lambert Intl. Airport (STL)

Frequently asked questions

How much does a flight from Niagara Falls Intl. Airport (IAG) to Lambert-St. Louis Intl. Airport (STL) cost?
Lock in a cheap one-way flight or cheap return flight from Niagara Falls Intl. Airport (IAG) 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 Niagara Falls Intl. Airport (IAG) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from IAG to STL is , when demand is low. Off-peak months are often when you'll find cheap fares for travel between these airports.
Which airlines fly direct from Niagara Falls Intl. Airport (IAG) to Lambert-St. Louis Intl. Airport (STL)?
While Niagara Falls, NY (IAG-Niagara Falls Intl.) doesn't have any direct flights to Lambert-St. Louis Intl. Airport (STL), other airports have nonstop options. Traveling from Pearson Intl. Airport (YYZ) will get you to St. Louis without any layovers.
How many flights per day from Niagara Falls Intl. Airport (IAG) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily direct flights from Niagara Falls Intl. Airport (IAG) to Lambert-St. Louis Intl. Airport (STL). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be on your way before you know it.
What day of the week has the most flights from IAG to STL?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be 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 Niagara Falls Intl. Airport (IAG) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Niagara Falls Intl. Airport (IAG) to Lambert-St. Louis Intl. Airport (STL) route, aim to 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 Niagara Falls Intl. Airport (IAG) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your flight from IAG to STL shortly before your trip is generally more expensive. But if you're flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book an IAG to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAG to STL flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one place takes the hassle out of planning your trip. Just pick your flights and select from our extensive range of stays, then customize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Niagara Falls Intl. Airport (IAG) to Lambert-St. Louis Intl. Airport (STL)?
Generally, it's possible to cancel or reschedule your IAG to STL flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Niagara Falls Intl.
Destination airport
Lambert-St. Louis Intl.
Distance
667 mi

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Niagara Falls to St. Louis Flights

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

 

The best time to book a flight from Niagara Falls to St. Louis

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

 

Niagara Falls to St. Louis Flights

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*Available to One Key members.