What is the cheapest month to book a flight from St. Louis to Guam?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Guam (average of $1,977). Flying from St. Louis to Guam in May is currently the most expensive (average of $2,214). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

In terms of precipitation, rainfall in Guam ranges from 2.6 - 14.4 inches per month. August is typically the wettest month, when rainfall can reach 14.4 in. March is typically the driest time to visit Guam when rainfall is around 2.6 in.

If weather is an important factor for your trip to Guam, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

What is the cheapest month to fly from St. Louis to Guam?

The best pricing can be found in the month of October. Prices to Guam from St. Louis average $2,182. You can even find prices in October for less than $2,182, as users have found deals to Guam from as low as $1,917. The month of December appears to be one of the more expensive times to travel to Guam from St. Louis. Flying in the targeted month can save you up to 16%.

What is the cheapest time of day to fly from STL to GU?

When flying from St. Louis to Guam, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from St. Louis to Guam?

If you book a flight to Guam from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

Can I find deals for flights from St. Louis to Guam that include hotel bookings?

Yes. In addition to deals on St. Louis to Guam flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Guam?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Guam.

Can I find deals for business class flights from St. Louis to Guam?

Yes. Cheapflights offers flight deals from St. Louis to Guam by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$1,562+ Flights from St. Louis to Guam

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Cheap flight deals from St. Louis to Guam

Round-trip from	$1,082 (United Airlines)
Popular in	December
Cheapest in	October
Average price	$2,327

From Lambert-St Louis to Guam

Search Deals

Highest demand for flights based on searches. 2% potential increase in price ($48 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($42 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

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Find flight deals from St. Louis to Guam

Cheapest flights from St. Louis to Guam
Explore the most affordable flight options available from St. Louis to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Fri 11/2811:10 amSTL - GUM

2 stops60h 35mUnited Airlines

Tue 12/27:25 amGUM - STL

2 stops25h 01mUnited Airlines

Deal found 6/30

$1,082

Best flights from St. Louis to Guam
Discover carefully curated flight deals from St. Louis to Guam that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Fri 11/2811:10 amSTL - GUM

2 stops60h 35mUnited Airlines

Tue 12/27:25 amGUM - STL

2 stops25h 01mUnited Airlines

Deal found 6/30

$1,082

Last-minute flights from St. Louis to Guam
Discover last-minute flight deals from St. Louis to Guam. Data last updated July 3, 2025 and is based on user searches.

Sat 7/56:33 amSTL - GUM

2 stops20h 32mUnited Airlines

Mon 7/77:00 pmGUM - STL

2 stops39h 00mUnited Airlines

Deal found 7/1

$3,002

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Guam that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTamuning

STL - GUM

STLGUM

Lambert-St Louis

Fri 11/28

11:10 am-3:45 pm

2 stops60h 35m

Tamuning Guam Intl

Tue 12/2

7:25 am-4:26 pm

2 stops25h 01m

$1,082

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Best time to book a flight from St. Louis to Guam

Have a flexible travel schedule? Discover the best time to fly to Guam from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Guam

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Guam

See what other customers who have flown with United Airlines from St. Louis to Guam have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,861 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,861 reviews

United Airlines

7.4

Good

8,861 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

What airport do you fly from for flights from St. Louis to Guam?
If you book a flight to Guam from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.
Can I find deals for flights from St. Louis to Guam that include hotel bookings?
Yes. In addition to deals on St. Louis to Guam flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Guam?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Guam.
Can I find deals for business class flights from St. Louis to Guam?
Yes. Cheapflights offers flight deals from St. Louis to Guam by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Guam?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Guam (average of $1,977). Flying from St. Louis to Guam in May is currently the most expensive (average of $2,214). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from St. Louis to Guam

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$1,916	Average$2,326	FlexibilityNo cancel fee	On-time69%

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$1,082+ Cheap flights from St. Louis (STL) to Guam

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/28. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Guam with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Guam

Keep the following information in mind while searching for St. Louis to Guam flight deals. Data was last updated July 3, 2025.

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Guam

Cheapest flights from St. Louis to GuamExplore the most affordable flight options available from St. Louis to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Explore the most affordable flight options available from St. Louis to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Guam that are best for you.

Best time to book a flight from St. Louis to Guam

Have a flexible travel schedule? Discover the best time to fly to Guam from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Guam

Reviews of airlines servicing Guam

Get insights into the airlines that provide service to Guam. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Guam. Reviews last updated July 3, 2025.

See what other customers who have flown with United Airlines from St. Louis to Guam have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Guam. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from St. Louis to Guam?

Can I find deals for flights from St. Louis to Guam that include hotel bookings?

How can I find direct flights from St. Louis to Guam?

Can I find deals for business class flights from St. Louis to Guam?

What is the cheapest month to book a flight from St. Louis to Guam?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Guam

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from St. Louis to Guam

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Travel Smart

Cheapest flights from St. Louis to Guam
Explore the most affordable flight options available from St. Louis to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.