What are the cheapest airlines flying from St. Louis to Tamuning round-trip?

Our cheapest airline available from St. Louis to Tamuning is United Airlines. Our recent data shows that you can find tickets from as low as $1,093 on this airline. An additional option worth looking into is Delta, starting at $2,153. United Airlines is 49% cheaper than the average price of flights available within the next 90 days to this destination.

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to Tamuning (average of $1,977). Flying from St. Louis to Tamuning 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.

What is the cheapest day to fly from St. Louis to Tamuning?

Travelers seeking maximum savings on their St. Louis to Tamuning flight should consider departing on Wednesday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Tamuning 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 Tamuning when rainfall is around 2.6 in.

If weather is an important factor for your trip to Tamuning, 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 day to fly round-trip from St. Louis to Tamuning?

Users have found that flying from St. Louis to Tamuning on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

Our data shows that November tends to be the cheapest month to fly to Tamuning from St. Louis. Users have commonly found prices around $2,180 for the month, but tickets can be as low as $1,916. Due to multiple factors, prepare for potentially higher prices in December.

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Tamuning as you normally would.

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

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

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

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

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

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

$1,093+ Flights from St. Louis to Tamuning

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Cheap flight deals from St. Louis to Tamuning

Round-trip from	$1,093 (United Airlines)
Popular in	December
Cheapest in	November
Average price	$2,327

From Lambert-St Louis to Tamuning Guam Intl

Search Deals

Highest demand for flights based on searches. 1% potential increase in price ($43 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($41 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 Tamuning

Cheapest flights from St. Louis to Tamuning
Explore the most affordable flight options available from St. Louis to Tamuning. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

Fri 11/285:29 pmSTL - GUM

2 stops54h 16mUnited Airlines

Tue 12/27:25 amGUM - STL

2 stops29h 32mUnited Airlines

Deal found 7/30

$1,093

Wed 8/276:00 amSTL - GUM

2 stops42h 15mDelta

Wed 9/35:00 pmGUM - STL

2 stops44h 02mDelta

Deal found 7/30

$2,153

Best flights from St. Louis to Tamuning
Discover carefully curated flight deals from St. Louis to Tamuning that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 31, 2025.

Fri 11/285:29 pmSTL - GUM

2 stops54h 16mUnited Airlines

Tue 12/27:25 amGUM - STL

2 stops29h 32mUnited Airlines

Deal found 7/30

$1,093

Wed 8/276:00 amSTL - GUM

2 stops42h 15mDelta

Wed 9/35:00 pmGUM - STL

2 stops44h 02mDelta

Deal found 7/30

$2,153

Last-minute flights from St. Louis to Tamuning
Discover last-minute flight deals from St. Louis to Tamuning. Data last updated July 31, 2025 and is based on user searches.

Wed 8/276:00 amSTL - GUM

2 stops42h 15mDelta

Wed 9/35:00 pmGUM - STL

2 stops44h 02mDelta

Deal found 7/30

$2,153

Wed 8/276:15 amSTL - GUM

2 stops20h 50mUnited Airlines

Wed 9/312:30 pmGUM - STL

3 stops21h 57mUnited Airlines

Deal found 7/30

$2,555

One-way flights from St. Louis to Tamuning
Search for one-way flight options from St. Louis to Tamuning. Find affordable one-way fares based on user searches. Data last updated July 31, 2025.

Thu 8/76:40 amSTL - GUM

2 stops41h 35mDelta

Deal found 7/30

$1,547

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTamuning

STL - GUM

STLGUM

Lambert-St Louis

Fri 11/28

5:29 pm-3:45 pm

2 stops54h 16m

Tamuning Guam Intl

Tue 12/2

7:25 am-8:57 pm

2 stops29h 32m

$1,093

St. LouisTamuning

STL - GUM

STLGUM

Lambert-St Louis

Wed 8/27

6:00 am-3:15 pm

2 stops42h 15m

Tamuning Guam Intl

Wed 9/3

5:00 pm-10:02 pm

2 stops44h 02m

$2,153

St. LouisTamuning

STL - GUM

STLGUM

Lambert-St Louis

Thu 8/7

6:40 am-3:15 pm

2 stops41h 35m

$1,547

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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

Have a flexible travel schedule? Discover the best time to fly to Tamuning 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.

Reviews of airlines servicing Tamuning

Read reviews from past customers who have flown Delta and United Airlines from St. Louis to Tamuning. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,980 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,980 reviews

Delta

8.0

Very good

7,980 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,902 reviews

Delta

8.0

Very good

7,980 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from St. Louis to Tamuning round-trip?
Our cheapest airline available from St. Louis to Tamuning is United Airlines. Our recent data shows that you can find tickets from as low as $1,093 on this airline. An additional option worth looking into is Delta, starting at $2,153. United Airlines is 49% cheaper than the average price of flights available within the next 90 days to this destination.
Can I find deals for flights from St. Louis to Tamuning that include hotel bookings?
Yes. In addition to deals on St. Louis to Tamuning flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Tamuning?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Tamuning.
Can I find deals for business class flights from St. Louis to Tamuning?
Yes. Cheapflights offers flight deals from St. Louis to Tamuning 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 Tamuning?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Tamuning (average of $1,977). Flying from St. Louis to Tamuning 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

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Top airline flying from St. Louis to Tamuning

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$1,916	Average$2,327	FlexibilityNo cancel fee	On-time69%

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$1,093+ Cheap flights from St. Louis (STL) to Tamuning (GUM)

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 Tamuning with Cheapflights

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Cheap flight deals from St. Louis to Tamuning

Round-trip from

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Average price

Find flight deals from St. Louis to Tamuning

Cheapest flights from St. Louis to TamuningExplore the most affordable flight options available from St. Louis to Tamuning. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

Explore the most affordable flight options available from St. Louis to Tamuning. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

Cheapflights Fare Finder

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

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

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

Reviews of airlines servicing Tamuning

Read reviews from past customers who have flown Delta and United Airlines from St. Louis to Tamuning. Users can see the overall rating for each airline as well as how each is rated 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 Tamuning. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from St. Louis to Tamuning round-trip?

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

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

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

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

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 Tamuning

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

Top airline flying from St. Louis to Tamuning

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Book with Flexibility

Travel Smart

Cheapest flights from St. Louis to Tamuning
Explore the most affordable flight options available from St. Louis to Tamuning. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.