Title: Cheap Flights from St. Louis (STL) to Pasco (PSC) - Expedia.ca ![Beautiful lake. ](https://images.trvl-media.com/place/2878/e076e0af-b611-4721-b423-65a87b93597f.jpg?impolicy=fcrop&w=1200&h=500&q=medium) Photo by Brandi Blair ![](https://images.trvl-media.com/place/2878/e076e0af-b611-4721-b423-65a87b93597f.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from St. Louis (STL) to Pasco (PSC) - [Roundtrip](?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 Tri-Cities Airport (PSC) - ![Alaska Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:stl,to:psc,departure:07/11/2025TANYT&leg2=from:psc,to:stl,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.ca/Flights-Search?leg1=from:stl,to:psc,departure:07/11/2025TANYT&leg2=from:psc,to:stl,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:stl,to:psc,departure:07/11/2025TANYT&leg2=from:psc,to:stl,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.ca/Flights-Search?leg1=from:stl,to:psc,departure:07/11/2025TANYT&leg2=from:psc,to:stl,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![Hawaiian Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_HA.svg) Hawaiian Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:stl,to:psc,departure:07/11/2025TANYT&leg2=from:psc,to:stl,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"HA"}}]) ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) ## Find the cheapest month to fly from St. Louis (STL) to Pasco (PSC) ### September is typically the cheapest month to fly From CA $380 - CA $991 per traveller. ## Frequently asked questions ### How much is a flight from Lambert-St. Louis Intl. Airport (STL) to Tri-Cities Airport? > Based on fares quoted within the last 7 days on Expedia for flights departing within the next year, round-trip journeys from STL to Tri-Cities Airport (PSC) start from . Book ASAP to get the best price for your journey. 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-St. Louis Intl. Airport (STL) to Tri-Cities Airport? > Every air carrier has its own set of terms and conditions. If you decide to cancel your trip, head to our [Customer Service Portal](https://www.expedia.ca/helpcenter). ### How do I find cheap flights from Lambert-St. Louis Intl. Airport (STL) to Tri-Cities Airport that have flexible change policies? > Flights from STL to Tri-Cities Airport (PSC) offering flexible change policies are available with many carriers. Simply use our "No change fees" filter while searching. You'll only need to pay the cost difference between flights, without any extra fees to worry about. ### How many hours is the flight from Lambert Field to PSC? > There are plenty of ways to make the 5 hours and 50 minutes between STL and Tri-Cities Airport (PSC) go by quicker. If you want to be productive, sort through your photos or delete all those backed-up emails. A snooze also helps pass the time! ### How far is the flight from Lambert Field to Tri-Cities Airport (PSC)? > The flight distance from St. Louis to Pasco is 2,500 kilometres. Bring a snack, a drink and something to read. Keep yourself entertained and the time will fly by. ### Which airlines fly direct from Lambert Field to PSC? > Unfortunately, there are no airlines that fly directly between STL and Tri-Cities Airport. You'll have to book a flight with one or more stops. ### Are Lambert Field to Tri-Cities Airport (PSC) flight tickets cheaper when they're purchased at the last minute? > Flight prices from Lambert Field to Tri-Cities Airport are available up to 12 months before departure on Expedia. And although you may occasionally pick up great last-minute deal, it's not something you should count on. Also, booking your flights well in advance means you'll have more options — and you can avoid getting trapped in the dreaded middle seat! We're constantly updating our fares to bring you the biggest bargains, so check back often for all the latest specials. ## Travel information | Origin airport | Lambert-St. Louis Intl. | | --- | --- | | Destination airport | Tri-Cities | | Distance | 2469 km | ## Book with confidence ### St. Louis to Pasco Flights **The easy way to book your flights from St. Louis to Pasco**  With Expedia, it’s simple to find and book flights to Pasco from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from airlines that cover this route. There are nonstop flights to Tri-Cities, too.   Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Pasco today, tomorrow, or this week.   **Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Tri-Cities, PSC**  Sort your search results by price to find great deals on your flight from St. Louis to Pasco—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Pasco from St. Louis currently is just rising to .   Here are more money-saving tips:  - Fly in when flight prices are normally at their lowest  - Book about a month to 6 weeks before you travel for the best prices to Pasco   - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times  - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free!  **Reasons to choose Expedia for your flight to Pasco from St. Louis**  Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. 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