$527 Cheap Flights from Gustavus (GST) to Denver (DEN)

View $527 flight on Sat, Aug 30, 2025Opens in a new window

Popular airlines from Gustavus, AK (GST) to Denver Intl. Airport (DEN)

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Gustavus to Denver (GST-DEN)

Prices were available within the past 7 days and start at $527 for one-way flights and $969 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, Jul 11 - Tue, Jul 15
GST
Gustavus
DEN
Denver
$969 Roundtrip, found 4 days ago
$969
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri, Jul 11 from Gustavus to Denver, returning Tue, Jul 15, priced at $969 found 4 days ago
Alaska Airlines
Fri, Jul 11 - Tue, Jul 15
GST
Gustavus
DEN
Denver
$1,003 Roundtrip, found 4 days ago
$1,003
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri, Jul 11 from Gustavus to Denver, returning Tue, Jul 15, priced at $1,003 found 4 days ago
Alaska Airlines
Fri, Jul 11 - Tue, Jul 15
GST
Gustavus
DEN
Denver
$1,194 Roundtrip, found 4 days ago
$1,194
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri, Jul 11 from Gustavus to Denver, returning Tue, Jul 15, priced at $1,194 found 4 days ago
Alaska Airlines
Fri, Jul 11 - Tue, Jul 15
GST
Gustavus
DEN
Denver
$1,271 Roundtrip, found 4 days ago
$1,271
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri, Jul 11 from Gustavus to Denver, returning Tue, Jul 15, priced at $1,271 found 4 days ago
Air Excursions LLC
Fri, Jul 11 - Tue, Jul 15
GST
Gustavus
DEN
Denver
$1,307 Roundtrip, found 4 days ago
$1,307
Roundtrip
found 4 days ago
Select Air Excursions LLC flight, departing Fri, Jul 11 from Gustavus to Denver, returning Tue, Jul 15, priced at $1,307 found 4 days ago
Flights from Gustavus (GST) to Denver (DEN)
Origin airport
Gustavus
Destination airport
Denver Intl.
Roundtrip price
$968
Distance
1870 mi

Gustavus to Denver Flights

The cheapest times to fly from Gustavus to Denver

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

 

The best time to book a flight from Gustavus to Denver

Sunday is one of the best days to book for cheap flights from Gustavus to Denver: 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 Gustavus to Denver

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 Gustavus to Denver in 2025. You can also book with separate airlines for your outbound and return journeys, from $527 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 Gustavus to Denver 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 Gustavus to Denver 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

How much is a flight from GST to Denver Intl. Airport (DEN)?
Based on airfares available within the last 7 days on Expedia for flights departing within the next year, round-trip flights between GST and DEN start from $969. Book now to get the best price for your exciting adventure. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Gustavus Airport (GST) to DIA airport?
Each airline has its own set of terms and conditions. If you decide to cancel your escape, visit our Customer Service Portal.
How do I find cheap flights from Gustavus Airport to Denver Airport 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 Gustavus Airport (GST) to DEN flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Gustavus Airport (GST) to Denver Airport?
The flight distance from Gustavus to Denver is 1865 mi. Bring a drink, a few snacks and a few good podcasts. Keep yourself entertained and the time will fly by.
Which airlines fly direct from Gustavus Airport to DIA airport?
There are no direct flights, so you'll have to make at least one stop between Gustavus Airport (GST) and Denver Intl. Airport (DEN). Take advantage of the layover time to stretch your legs and freshen up.
Are GST to DIA airport flight tickets cheaper when they're purchased at the last minute?
Flight tickets from Gustavus Airport to Denver Airport are available up to 12 months prior to departure on Expedia. And although you may nab great last-minute deal, it's not something you should count on. Also, booking your flights ahead of time means you'll have more options --- and you can avoid getting caught in the dreaded middle seat! We frequently update our fares to bring you the biggest bargains, so check back often for all the latest specials.

Explore a world of travel with Expedia

*Available to One Key members.