$1,547 Cheap Flights from St. Louis (STL) to Guam (GUM)

View $1,547 flight on Tue, Dec 9, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Barrigada - A.B. Won Pat International Airport (GUM)

Cheap Flights from St. Louis to Guam (STL-GUM)

Prices were available within the past 7 days and start at $1,547 for one-way flights and $1,918 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Feb 5 - Thu, Feb 19
STL
St. Louis
GUM
Guam
$1,918 Roundtrip, found 1 hour ago
$1,918
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Feb 5 from St. Louis to Guam, returning Thu, Feb 19, priced at $1,918 found 1 hour ago
United
Wed, Mar 4 - Mon, Mar 16
STL
St. Louis
GUM
Guam
$1,925 Roundtrip, found 15 hours ago
$1,925
Roundtrip
found 15 hours ago
Select United flight, departing Wed, Mar 4 from St. Louis to Guam, returning Mon, Mar 16, priced at $1,925 found 15 hours ago
United
Thu, Feb 5 - Thu, Feb 19
STL
St. Louis
GUM
Guam
$1,928 Roundtrip, found 1 hour ago
$1,928
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Feb 5 from St. Louis to Guam, returning Thu, Feb 19, priced at $1,928 found 1 hour ago
United
Wed, Mar 4 - Mon, Mar 16
STL
St. Louis
GUM
Guam
$1,938 Roundtrip, found 15 hours ago
$1,938
Roundtrip
found 15 hours ago
Select United flight, departing Wed, Mar 4 from St. Louis to Guam, returning Mon, Mar 16, priced at $1,938 found 15 hours ago
United
Wed, Mar 4 - Mon, Mar 16
STL
St. Louis
GUM
Guam
$1,939 Roundtrip, found 15 hours ago
$1,939
Roundtrip
found 15 hours ago
Select United flight, departing Wed, Mar 4 from St. Louis to Guam, returning Mon, Mar 16, priced at $1,939 found 15 hours ago
United
Thu, Feb 5 - Thu, Feb 19
STL
St. Louis
GUM
Guam
$1,942 Roundtrip, found 1 hour ago
$1,942
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Feb 5 from St. Louis to Guam, returning Thu, Feb 19, priced at $1,942 found 1 hour ago
United
Sun, Mar 29 - Mon, Apr 13
STL
St. Louis
GUM
Guam
$1,943 Roundtrip, found 6 days ago
$1,943
Roundtrip
found 6 days ago
Select United flight, departing Sun, Mar 29 from St. Louis to Guam, returning Mon, Apr 13, priced at $1,943 found 6 days ago
United
Thu, Feb 5 - Thu, Feb 19
STL
St. Louis
GUM
Guam
$1,945 Roundtrip, found 1 hour ago
$1,945
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Feb 5 from St. Louis to Guam, returning Thu, Feb 19, priced at $1,945 found 1 hour ago
United
Wed, Mar 4 - Mon, Mar 16
STL
St. Louis
GUM
Guam
$1,946 Roundtrip, found 15 hours ago
$1,946
Roundtrip
found 15 hours ago
Select United flight, departing Wed, Mar 4 from St. Louis to Guam, returning Mon, Mar 16, priced at $1,946 found 15 hours ago
Delta
Wed, Mar 4 - Mon, Mar 16
STL
St. Louis
GUM
Guam
$1,953 Roundtrip, found 15 hours ago
$1,953
Roundtrip
found 15 hours ago
Select Delta flight, departing Wed, Mar 4 from St. Louis to Guam, returning Mon, Mar 16, priced at $1,953 found 15 hours ago

Alternative airports near Barrigada

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to A.B. Won Pat Intl. GUM. Cheapest option available. Flights from $2,053
GUM
A.B. Won Pat Intl.
Cheapest
Flights from $2,053

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to A.B. Won Pat Intl. Airport (GUM) cost?
Secure a cheap one-way flight from $1,547 or cheap return flight from $1,918 from Lambert-St. Louis Intl. Airport (STL) to A.B. Won Pat Intl. Airport (GUM) 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 Lambert-St. Louis Intl. Airport (STL) to A.B. Won Pat Intl. Airport (GUM)?
February is the most affordable month to fly from STL to GUM. Avoiding peak travel times is often the key to finding a great deal.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to A.B. Won Pat Intl. Airport (GUM)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest STL to GUM flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to A.B. Won Pat Intl. Airport (GUM)?
There aren't any daily direct flights available from Lambert-St. Louis Intl. Airport (STL) to A.B. Won Pat Intl. Airport (GUM). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from STL to GUM?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to A.B. Won Pat Intl. Airport (GUM)?
To arrive at A.B. Won Pat Intl. Airport (GUM) without delays, select a flight that leaves from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Lambert-St. Louis Intl. Airport (STL) to A.B. Won Pat Intl. Airport (GUM) last-minute?
Waiting until just before your trip to book a flight from STL to GUM often results in higher prices. While you may come across some last-minute discounts, they aren't always guaranteed. Allow some flexibility in your schedule for the best chance of landing a bargain.
Is it cheaper to book a STL to GUM flight and hotel package?
You can save money by securing a STL to GUM flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've chosen your preferred flights and accommodations, consider adding extras including tours, activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to A.B. Won Pat Intl. Airport (GUM)?
In most cases, you're able to reschedule or cancel your STL to GUM flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want more details, visit our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
A.B. Won Pat Intl.
Airlines serving
Delta, United
Roundtrip price
$1,917
Distance
7371 mi

Book with confidence

Book with confidence

St. Louis to Guam Flights

The cheapest times to fly from St. Louis to Guam

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

 

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

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

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 Guam in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,547 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 Guam 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 Guam 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.

 

St. Louis to Guam Flights
*Available to One Key members.