Beginning of main content
Trip Type
Flight 1
Flight 2
Flight 3
Flight 4
Flight 5

Search over 321,000 hotels worldwide and 400 airlines worldwide.

Secure incredible value with Expedia's Price Guarantee.

No Expedia cancellation fee to change or cancel almost any hotel reservation.

Cheap BOI to STL Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Cheap BOI to STL Flights

Question : If your plans are flexible, have you considered changing your departure day?
Answer : The best day to fly on a budget this month is Thursday. Flexibility is paramount when booking travel plans in order to keep travel costs down.

Question : What is the likelihood your flight will be delayed for this route?
Answer : The Boise to Saint Louis route has been excellent at getting passengers to their destination on time, with a 100% on-time rate. When there is a delay, it averages less than 15 minutes.

Question : Which airline is giving the best deals for round-trip flights from Boise Air Terminal (Gowen Field) (BOI) to Lambert-St. Louis International Airport (STL)?
Answer : American Airlines is offering the best deal at $249. Better take a look quickly because prices range all the way up to $991 over the next three months.

Question : In terms of overall promptness, how does BOI to STL rank compared to the rest of the world?
Answer : The best measurement of overall promptness combines both on-time percentage and total delay minutes. BOI to STL currently has 5 stars out of 5, earning it one of the best performances in the world.

Question : Do travelers from Boise typically stay in Saint Louis for very long?
Answer : The average time spent in Saint Louis by travelers from Boise is about one week.

Question : Do prices fluctuate more for this route than others?
Answer : Flight prices fluctuate more than most routes in the United States for BOI to STL. They vary from $249 to $991. Remember, the sooner you book, the better price you tend to get.

Question : What day in the next four weeks has the best fares?
Answer : As of Jan 15th, the cheapest day to fly from Boise to Saint Louis is Feb 10th. Tickets are currently being sold for $249, which is 39% below the average price for this route.

Boise to St. Louis Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Boise to St. Louis will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring St. Louis.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with BOI to STL flights that won’t make your bank account wince. Ready to temporarily leave behind Boise for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to STL with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.