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$999+ Cheap flights from Illinois 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.
ORD — GUM
Aug 6 — Aug 131
Wed 8/6
Wed 8/13
1 adult, Economy
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Cheap flight deals from Illinois to Guam

Keep the following information in mind while searching for Illinois to Guam flight deals. Data was last updated August 1, 2025.

Round-trip from

$999
(United Airlines)

Popular in

July

Cheapest in

March

Average price

$2,479
From Illinois to Guam
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($58 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
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Find flight deals from Illinois to Guam

Cheapest flights from Illinois to Guam
Explore the most affordable flight options available from Illinois to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2025.

This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/285:29 pmSTL - GUM
2 stops54h 16mUnited Airlines
Tue 12/27:25 amGUM - STL
2 stops21h 14mUnited Airlines
Deal found 7/31$999
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/66:00 amORD - GUM
2 stops20h 50mUnited Airlines
Tue 11/257:25 amGUM - ORD
2 stops27h 28mUnited Airlines
Deal found 7/30$1,917
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/109:30 amORD - GUM
2 stops37h 05mDelta
Sun 11/234:50 pmGUM - ORD
2 stops39h 44mDelta
Deal found 7/30$1,933
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:00 amMDW - GUM
2 stops40h 35mDelta
Tue 1/134:50 pmGUM - MDW
2 stops44h 56mDelta
Deal found 7/30$2,048
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/276:00 amSTL - GUM
2 stops42h 15mDelta
Wed 9/35:00 pmGUM - STL
2 stops44h 02mDelta
Deal found 7/30$2,153

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Guam that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 1, 2025.
Use the filters below to find and compare flights from Illinois to Guam that are best for you.

Fly from

Illinois

Fly to

Guam

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-12:39 pm

2 stops21h 14m

$999

ChicagoTamuning

ORD - GUM

ORDGUM

Chicago O'Hare Intl

Thu 11/6

6:00 am-6:50 pm

2 stops20h 50m

Tamuning Guam Intl

Thu 11/27

7:25 am-2:48 pm

2 stops23h 23m

$1,917

ChicagoTamuning

ORD - GUM

ORDGUM

Chicago O'Hare Intl

Mon 11/10

9:30 am-2:35 pm

2 stops37h 05m

Tamuning Guam Intl

Sun 11/23

4:50 pm-4:34 pm

2 stops39h 44m

$1,933

ChicagoTamuning

MDW - GUM

MDWGUM

Chicago Midway

Mon 12/1

6:00 am-2:35 pm

2 stops40h 35m

Tamuning Guam Intl

Tue 1/13

4:50 pm-9:46 pm

2 stops44h 56m

$2,048

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 Illinois to Guam

Have a flexible travel schedule? Discover the best time to fly to Guam from Illinois 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 Illinois to Guam

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

Find hourly flight availability from Illinois to Guam. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 1, 2025.

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

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 August 1, 2025.
Read through reviews of airlines operating flights from Illinois to Guam, such as Delta and United Airlines. 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
7,983 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

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
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

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
8,904 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

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

Find useful and relevant information for your journey from Illinois 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 Illinois to Guam that include hotel bookings?

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

  • How can I find direct flights from Illinois to Guam?

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

  • Can I find deals for business class flights from Illinois to Guam?

    Yes. Cheapflights offers flight deals from Illinois 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 Illinois to Guam?

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

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Top airline flying from Illinois to Guam

Discover the top airline that operate flights from Illinois to Guam. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,916Average$2,227FlexibilityNo cancel feeOn-time69%

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