$438 Cheap Flights from Denver (DEN) to Gustavus (GST)

View $438 flight on Mon, Aug 3, 2026Opens in a new window

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

Cheap Flights from Denver to Gustavus (DEN-GST)

Prices were available within the past 7 days and start at $438 for one-way flights and $975 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, Aug 3 - Sat, Aug 8
DEN
Denver
GST
Gustavus
$975 Roundtrip, found 2 days ago
$975
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Aug 3 from Denver to Gustavus, returning Sat, Aug 8, priced at $975 found 2 days ago
Alaska Airlines
Mon, Aug 3 - Sat, Aug 8
DEN
Denver
GST
Gustavus
$981 Roundtrip, found 2 days ago
$981
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Aug 3 from Denver to Gustavus, returning Sat, Aug 8, priced at $981 found 2 days ago
Alaska Airlines
Mon, Aug 3 - Sat, Aug 8
DEN
Denver
GST
Gustavus
$991 Roundtrip, found 2 days ago
$991
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Aug 3 from Denver to Gustavus, returning Sat, Aug 8, priced at $991 found 2 days ago
Alaska Airlines
Mon, Aug 3 - Sat, Aug 8
DEN
Denver
GST
Gustavus
$1,258 Roundtrip, found 2 days ago
$1,258
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Aug 3 from Denver to Gustavus, returning Sat, Aug 8, priced at $1,258 found 2 days ago
Alaska Airlines
Mon, Aug 3 - Sat, Aug 8
DEN
Denver
GST
Gustavus
$1,268 Roundtrip, found 2 days ago
$1,268
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Aug 3 from Denver to Gustavus, returning Sat, Aug 8, priced at $1,268 found 2 days ago
Alaska Airlines
Mon, Aug 3 - Sat, Aug 8
DEN
Denver
GST
Gustavus
$1,282 Roundtrip, found 2 days ago
$1,282
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Aug 3 from Denver to Gustavus, returning Sat, Aug 8, priced at $1,282 found 2 days ago
Flights from Denver (DEN) to Gustavus (GST)
Origin airport
Denver Intl.
Destination airport
Gustavus
Roundtrip price
$975
Distance
1870 mi

Denver to Gustavus Flights

The cheapest times to fly from Denver to Gustavus

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

 

The best time to book a flight from Denver to Gustavus

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

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 Denver to Gustavus in 2025. You can also book with separate airlines for your outbound and return journeys, from $438 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 Denver to Gustavus 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 Denver to Gustavus 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 does a flight from Denver Intl. Airport (DEN) to Gustavus Airport (GST) cost?
Lock in a cheap one-way flight from $438 or cheap return flight from $975 from Denver Intl. Airport (DEN) to Gustavus Airport (GST) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Denver Intl. Airport (DEN) to Gustavus Airport (GST)?
Flying in August can help you save, as it's the cheapest month for flights between DEN and GST. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Denver Intl. Airport (DEN) to Gustavus Airport (GST)?
To find the cheapest airline that'll fly you from DEN to GST, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Denver Intl. Airport (DEN) to Gustavus Airport (GST)?
There aren't any daily nonstop flights departing from Denver Intl. Airport (DEN) to Gustavus Airport (GST). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from DEN to GST?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Denver Intl. Airport (DEN) to Gustavus Airport (GST)?
Book a flight from Denver Intl. Airport (DEN) to Gustavus Airport (GST) that takes off before 3 PM to reduce the risk of cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to Gustavus Airport (GST) last-minute?
Booking your flight from DEN to GST shortly before your getaway is usually more expensive. However, if you're flexible with your schedule, you could land a cheap last-minute fare.
Is it cheaper to book a DEN to GST flight and hotel package?
Compared with arranging flights and hotels separately, booking a DEN to GST flight and hotel package with Expedia could lead to significant savings. Better yet, having it all in one place will take the stress out of planning your trip. Just secure your flights and choose from our wide range of stays, then customize your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Gustavus Airport (GST)?
It's generally possible to cancel or reschedule your DEN to GST flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.