Cheap Flights from St. Louis (STL) to Broomfield (BJC)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Broomfield, CO (BJC-Rocky Mountain Metropolitan)

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Flights from St. Louis (STL) to Broomfield (BJC)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Rocky Mountain Metropolitan
Distance
791 mi

St. Louis to Broomfield Flights

The cheapest times to fly from St. Louis to Broomfield

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

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

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

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 Broomfield 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 St. Louis to Broomfield 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 Broomfield 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.

Frequently asked questions

Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to BJC last minute?
Being the spontaneous type is an awesome way to travel around, but it isn’t always the wisest way to track down a bargain flight. It’s better to book your Lambert Field to BJC journey in advance instead of leaving it till the last minute. Based on flight pricing and demand studies in 2022, we have found that the best time to book domestic flights is between 28 – 35 days ahead of the departure date, and international flights three to four months in advance. Save all that spontaneity for when you arrive in BJC!
What airports do you fly into for Broomfield from St. Louis?
Broomfield, CO (BJC-Rocky Mountain Metropolitan), Denver Intl. Airport (DEN) and Boulder, CO (WBU-Boulder Municipal) are your choices when connecting from St. Louis to Broomfield. About 2 mi west of the heart of Broomfield, Broomfield, CO (BJC-Rocky Mountain Metropolitan) is the city’s major hub. Think about things such as flight arrival and departure times and the distance to your hotel before you select an airport. Water World and Omni Interlocken Resort Golf Club are a couple of top attractions to put on your must-see list when you get to your destination.
Can I change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to BJC?
You can quickly make changes to your Lambert Field to BJC trip by logging in to the Expedia Trips portal. But before you begin, review the rules and conditions in your itinerary to find out what you’re able to do and if any charges apply. Some airlines charge a change fee per person, plus any difference in ticket prices. But if you booked in the last 24 hours, you may be able to cancel for free and organize new flights. You can also swing by our Customer Service portal to find the answers to your questions and to chat with our Virtual Agent.

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