What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Guam?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Guam (average of $1,977). Flying from Washington, D.C. Dulles Intl Airport 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 Washington, D.C. Dulles Intl Airport to Guam?

Due to multiple factors, expect to potentially pay more when booking in September. For low rates, February can be a great choice for travel to Guam. Flights to Guam from Washington, D.C. Dulles Intl Airport in February are about $2,265 on average during February, but can be found for as low as $1,214.

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

When flying from Washington, D.C. Dulles Intl Airport 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.

Can I find deals for flights from Dulles Intl to Guam that include hotel bookings?

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

How can I find direct flights from Dulles Intl to Guam?

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

Can I find deals for business class flights from Dulles Intl to Guam?

Yes. Cheapflights offers flight deals from Dulles Intl 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.

$1,537+ Flights from Washington, D.C. Dulles Intl Airport to Guam

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Cheap flight deals from Dulles Intl to Guam

Round-trip from	$1,917 (United Airlines)
One-way from	$1,537 (Delta)
Popular in	September
Cheapest in	February
Average price	$2,017

From Washington, D.C. Dulles Intl to Guam

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One-way flight from Washington, D.C. Dulles Intl to Guam

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Highest demand for flights based on searches. 6% potential increase in price ($166 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($45 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from Dulles Intl to Guam

Cheapest flights from Dulles Intl to Guam
Explore the most affordable flight options available from Dulles Intl to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Sun 11/1610:08 pmIAD - GUM

2 stops29h 42mUnited Airlines

Mon 11/247:25 amGUM - IAD

2 stops28h 26mUnited Airlines

Deal found 7/29

$1,917

Sun 10/126:00 amIAD - GUM

2 stops28h 10mDelta

Thu 10/231:55 amGUM - IAD

2 stops28h 34mDelta

Deal found 7/29

$2,033

Best flights from Dulles Intl to Guam
Discover carefully curated flight deals from Dulles Intl to Guam that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Sun 11/1610:08 pmIAD - GUM

2 stops29h 42mUnited Airlines

Mon 11/247:25 amGUM - IAD

2 stops28h 26mUnited Airlines

Deal found 7/29

$1,917

Sun 10/126:00 amIAD - GUM

2 stops43h 15mDelta

Fri 10/245:00 pmGUM - IAD

2 stops44h 18mDelta

Deal found 7/29

$2,033

Last-minute flights from Dulles Intl to Guam
Discover last-minute flight deals from Dulles Intl to Guam. Data last updated July 29, 2025 and is based on user searches.

Mon 8/47:36 pmIAD - GUM

2 stops29h 39mDelta

Sun 8/101:55 amGUM - IAD

2 stops35h 00mDelta

Deal found 7/28

$2,798

Mon 8/412:20 pmIAD - GUM

1 stop26h 00mUnited Airlines

Mon 8/117:15 amGUM - IAD

2 stops20h 11mUnited Airlines

Deal found 7/28

$2,947

Tue 8/126:15 amIAD - GUM

2 stops27h 55mDelta

Mon 8/181:55 amGUM - IAD

2 stops35h 45mDelta

Deal found 7/27

$2,198

Tue 8/2612:20 pmIAD - GUM

1 stop26h 00mUnited Airlines

Tue 9/27:10 amGUM - IAD

2 stops25h 42mUnited Airlines

Deal found 7/27

$2,382

One-way flights from Dulles Intl to Guam
Search for one-way flight options from Dulles Intl to Guam. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Wed 8/276:00 amIAD - GUM

2 stops43h 15mDelta

Deal found 7/29

$1,537

Thu 8/2812:20 pmIAD - GUM

1 stop26h 00mUnited Airlines

Deal found 7/29

$1,724

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Guam that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Tamuning

IAD - GUM

IADGUM

Washington, D.C. Dulles Intl

Sun 11/16

10:08 pm-6:50 pm

2 stops29h 42m

Tamuning Guam Intl

Mon 11/24

7:25 am-8:51 pm

2 stops28h 26m

$1,917

Washington, D.C.Tamuning

IAD - GUM

IADGUM

Washington, D.C. Dulles Intl

Sun 10/12

6:00 am-3:15 pm

2 stops43h 15m

Tamuning Guam Intl

Fri 10/24

5:00 pm-11:18 pm

2 stops44h 18m

$2,033

Washington, D.C.Tamuning

IAD - GUM

IADGUM

Washington, D.C. Dulles Intl

Wed 8/27

6:00 am-3:15 pm

2 stops43h 15m

$1,537

Washington, D.C.Tamuning

IAD - GUM

IADGUM

Washington, D.C. Dulles Intl

Thu 8/28

12:20 pm-4:20 am

1 stop26h 00m

$1,724

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Dulles Intl to Guam

Have a flexible travel schedule? Discover the best time to fly to Guam from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Guam

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

Reviews of airlines servicing Guam

Peruse reviews from past customers who have flown with Delta and United Airlines from Washington, D.C. Dulles Intl Airport to Guam to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,979 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

7,979 reviews

Delta

8.0

Very good

7,979 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

8,896 reviews

Delta

8.0

Very good

7,979 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

Can I find deals for flights from Dulles Intl to Guam that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Guam flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Guam?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Guam.
Can I find deals for business class flights from Dulles Intl to Guam?
Yes. Cheapflights offers flight deals from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Guam?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Guam (average of $1,977). Flying from Washington, D.C. Dulles Intl Airport 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 Dulles Intl to Guam

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$2,017	Average$2,357	FlexibilityNo cancel fee	On-time69%

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$1,537+ Cheap flights from Dulles Intl (IAD) to Guam

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Guam with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Dulles Intl to Guam

Keep the following information in mind while searching for Dulles Intl to Guam flight deals. Data was last updated July 29, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Dulles Intl to Guam

Cheapest flights from Dulles Intl to GuamExplore the most affordable flight options available from Dulles Intl to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from Dulles Intl to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Guam that are best for you.

Best time to book a flight from Dulles Intl to Guam

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

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport 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 29, 2025.

Peruse reviews from past customers who have flown with Delta and United Airlines from Washington, D.C. Dulles Intl Airport to Guam to help guide your decision. You can also see how each airline stacks up 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 Dulles Intl to Guam. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Dulles Intl to Guam that include hotel bookings?

How can I find direct flights from Dulles Intl to Guam?

Can I find deals for business class flights from Dulles Intl to Guam?

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport 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 Dulles Intl to Guam

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

Top airline flying from Dulles Intl to Guam

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Dulles Intl to Guam
Explore the most affordable flight options available from Dulles Intl to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.