Title: Cheap Flights from St. Louis to Niagara Falls (STL to IAG) - Expedia.co.uk ![Bridal Veil Falls showing landscape views, a waterfall and a city](https://images.trvl-media.com/place/6066055/c442c496-ee29-41e5-9368-d8bd9109295b.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/6066055/c442c496-ee29-41e5-9368-d8bd9109295b.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from St. Louis (STL) to Niagara Falls (IAG) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Lambert-St. Louis International Airport (STL) to Niagara Falls, NY (IAG-Niagara Falls Intl.) - ![British Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_BA.svg) British Airways [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:iag,departure:03/10/2025TANYT&leg2=from:iag,to:stl,departure:10/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BA"}}]) - ![easyJet](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_U2.svg) easyJet [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:iag,departure:03/10/2025TANYT&leg2=from:iag,to:stl,departure:10/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"U2"}}]) - ![Lufthansa](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LH.svg) Lufthansa [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:iag,departure:03/10/2025TANYT&leg2=from:iag,to:stl,departure:10/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LH"}}]) - ![Ryanair](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_FR.svg) Ryanair [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:iag,departure:03/10/2025TANYT&leg2=from:iag,to:stl,departure:10/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"FR"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:iag,departure:03/10/2025TANYT&leg2=from:iag,to:stl,departure:10/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Jet2](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LS.svg) Jet2 [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:iag,departure:03/10/2025TANYT&leg2=from:iag,to:stl,departure:10/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LS"}}]) - ![Swiss International Air Lines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LX.svg) Swiss International Air Lines [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:iag,departure:03/10/2025TANYT&leg2=from:iag,to:stl,departure:10/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LX"}}]) - ## Plan, book, fly with confidence - ### Be in the know Get alerts if flight prices drop or rise\* - ### Book smarter Save up to 25% on select hotels after you book a flight\* - ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) Flight from St. Louis to Niagara Falls route information | Origin airport | Lambert-St. Louis Intl. | | --- | --- | | Destination airport | Niagara Falls Intl. | | Distance | 1067 km | ## Compare flights from St. Louis to Niagara Falls easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from St. Louis to Niagara Falls. Operating between them flights per day, airlines cover the route. And fly direct, getting you to Niagara Falls Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Lambert-St. Louis Intl. to Niagara Falls Intl..   To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.  Grab a great deal on your flight from Lambert-St. Louis Intl. (STL) to Niagara Falls Intl. (IAG) The easiest way to view the best deals on flights from St. Louis to Niagara Falls today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Lambert-St. Louis Intl. to Niagara Falls Intl. start at just and range up to .   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near St. Louis and Niagara Falls - booking your flight during , the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your St. Louis to Niagara Falls flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Lambert-St. Louis Intl. to Niagara Falls Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.   Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.   ## Frequently asked questions ### How much is a flight from STL to IAG? > Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip flight between St. Louis Lambert International Airport and IAG was . Cheap tickets don't last long, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Lambert Field to IAG? > This can vary between airlines, as each has its own set of terms and conditions. Head to the [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033), where you'll find easy-to-follow instructions on how to cancel your flight online. ### How do I find cheap flights from STL to Niagara Falls Intl. Airport (IAG) that have flexible change policies? > Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for St. Louis Lambert International Airport to Niagara Falls Intl. Airport (IAG) flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from Lambert-St. Louis Intl. Airport (STL) to Niagara Falls Intl. Airport? > You can forget about a movie marathon on this flight — it's only 1,100 kilometres from St. Louis to Niagara Falls. Find your seat, get comfortable and you'll be touching down before you know it. ### Which airlines fly direct from St. Louis Lambert International Airport to Niagara Falls Intl. Airport? > There are no direct flights, so you'll need to make at least one stop between St. Louis Lambert International Airport and Niagara Falls Intl. Airport (IAG). Take advantage of the layover time to stretch your legs and grab a coffee. ### Are Lambert-St. Louis Intl. Airport (STL) to IAG flight tickets cheaper when they're purchased at the last minute? > Fares from STL to IAG are available up to 12 months before departure on Expedia. And although you may occasionally score great last-minute deal, it's not something you should count on. Also, booking your flights in advance means you'll have more options — and you can avoid getting stuck in the dreaded middle seat! 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