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Flagstaff

$250+ Cheap flights from Illinois to Flagstaff (FLG)

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FLG
Aug 27 — Sep 31
Wed 8/27
Wed 9/3
1 adult, Economy
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Cheap flight deals from Illinois to Flagstaff

Keep the following information in mind while searching for Illinois to Flagstaff flight deals. Data was last updated August 22, 2025.

Round-trip from

$366
(American Airlines)

One-way from

$250
(American Airlines)

Popular in

April

Cheapest in

July

Average price

$480
From Illinois to Flagstaff Pulliam
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One-way flight from Illinois to Flagstaff Pulliam
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Highest demand for flights based on searches. 13% potential increase in price ($97 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Illinois to Flagstaff

Cheapest flights from Illinois to Flagstaff
Explore the most affordable flight options available from Illinois to Flagstaff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 22, 2025.

This American Airlines deal was found by Cheapflights users on 8/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/92:23 pmORD - FLG
1 stop7h 55mAmerican Airlines
Wed 9/1011:55 amFLG - ORD
1 stop7h 10mAmerican Airlines
Deal found 8/20$366
This American Airlines deal was found by Cheapflights users on 8/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/117:00 pmORD - FLG
1 stop5h 21mAmerican Airlines
Thu 9/185:24 pmFLG - ORD
1 stop5h 03mAmerican Airlines
Deal found 8/19$386
This American Airlines deal was found by Cheapflights users on 8/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:20 amSTL - FLG
1 stop7h 27mAmerican Airlines
Tue 11/44:04 pmFLG - STL
1 stop6h 46mAmerican Airlines
Deal found 8/21$386
This American Airlines deal was found by Cheapflights users on 8/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/171:20 pmORD - FLG
2 stops8h 58mAmerican Airlines
Wed 9/245:24 pmFLG - ORD
1 stop5h 03mAmerican Airlines
Deal found 8/20$396
This American Airlines deal was found by Cheapflights users on 8/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:21 pmSTL - FLG
1 stop6h 33mAmerican Airlines
Tue 10/211:20 pmFLG - STL
1 stop5h 07mAmerican Airlines
Deal found 8/21$416
This American Airlines deal was found by Cheapflights users on 8/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/273:08 pmORD - FLG
1 stop6h 35mAmerican Airlines
Mon 9/295:24 pmFLG - ORD
1 stop5h 03mAmerican Airlines
Deal found 8/21$436
This American Airlines deal was found by Cheapflights users on 8/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/178:00 amSTL - FLG
1 stop5h 25mAmerican Airlines
Mon 9/225:24 pmFLG - STL
1 stop4h 35mAmerican Airlines
Deal found 8/21$436
This American Airlines deal was found by Cheapflights users on 8/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/137:34 amORD - FLG
1 stop5h 51mAmerican Airlines
Thu 9/185:24 pmFLG - ORD
1 stop5h 03mAmerican Airlines
Deal found 8/21$446
This American Airlines deal was found by Cheapflights users on 8/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/178:00 amSTL - FLG
1 stop5h 25mAmerican Airlines
Wed 9/2410:38 amFLG - STL
1 stop7h 47mAmerican Airlines
Deal found 8/20$466
This American Airlines deal was found by Cheapflights users on 8/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:16 amSTL - FLG
2 stops11h 38mAmerican Airlines
Wed 10/17:00 amFLG - STL
1 stop6h 09mAmerican Airlines
Deal found 8/21$476
This American Airlines deal was found by Cheapflights users on 8/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/33:59 pmORD - FLG
1 stop6h 19mAmerican Airlines
Sun 10/55:24 pmFLG - ORD
1 stop5h 03mAmerican Airlines
Deal found 8/20$496
This American Airlines deal was found by Cheapflights users on 8/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/58:00 amSTL - FLG
1 stop5h 25mAmerican Airlines
Sun 9/710:38 amFLG - STL
1 stop4h 53mAmerican Airlines
Deal found 8/19$496

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Flagstaff 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 22, 2025.
Use the filters below to find and compare flights from Illinois to Flagstaff that are best for you.

Fly from

Illinois

Fly to

Flagstaff

Route

Depart

Return

Price

ChicagoFlagstaff

ORD - FLG

ORDFLG

Chicago O'Hare Intl

Tue 9/9

2:23 pm-8:18 pm

1 stop7h 55m

Flagstaff Pulliam

Wed 9/10

11:55 am-9:05 pm

1 stop7h 10m

$366

ChicagoFlagstaff

ORD - FLG

ORDFLG

Chicago O'Hare Intl

Wed 9/17

2:23 pm-8:18 pm

1 stop7h 55m

Flagstaff Pulliam

Wed 9/24

5:24 pm-12:27 am

1 stop5h 03m

$386

ChicagoFlagstaff

ORD - FLG

ORDFLG

Chicago O'Hare Intl

Sat 12/13

11:33 am-6:31 pm

1 stop7h 58m

Flagstaff Pulliam

Thu 12/18

1:11 pm-8:59 pm

1 stop6h 48m

$386

ChicagoFlagstaff

ORD - FLG

ORDFLG

Chicago O'Hare Intl

Thu 9/11

7:00 pm-10:21 pm

1 stop5h 21m

Flagstaff Pulliam

Thu 9/18

5:24 pm-12:27 am

1 stop5h 03m

$386

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Sat 11/1

7:00 am-10:47 am

1 stop5h 47m

Flagstaff Pulliam

Tue 11/4

4:04 pm-11:50 pm

1 stop6h 46m

$386

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Thu 9/18

6:18 pm-10:21 pm

1 stop6h 03m

Flagstaff Pulliam

Thu 9/25

5:24 pm-11:59 pm

1 stop4h 35m

$386

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Wed 9/17

8:00 am-11:25 am

1 stop5h 25m

Flagstaff Pulliam

Wed 9/24

8:00 am-6:22 pm

2 stops8h 22m

$396

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 11/7

2:29 pm-6:35 pm

1 stop5h 06m

Flagstaff Pulliam

Thu 11/13

1:00 pm-7:30 pm

1 stop5h 30m

$416

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Mon 10/6

6:23 pm-9:17 pm

1 stop4h 54m

Flagstaff Pulliam

Sat 10/11

1:20 pm-8:27 pm

1 stop5h 07m

$416

ChicagoFlagstaff

ORD - FLG

ORDFLG

Chicago O'Hare Intl

Thu 11/13

5:25 pm-11:43 pm

1 stop7h 18m

Flagstaff Pulliam

Sun 11/16

4:04 pm-12:12 am

1 stop7h 08m

$436

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 23 results
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Best time to book a flight from Illinois to Flagstaff

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

What is the cheapest month to book a flight from Illinois to Flagstaff?

Currently, August is the cheapest month in which you can book a flight from Illinois to Flagstaff (average of $516). Flying from Illinois to Flagstaff in March is currently the most expensive (average of $657). 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 time of day to fly from IL to FLG?

Find hourly flight availability from Illinois to Flagstaff. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 22, 2025.

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

Related info for your journey

Find useful and relevant information for your journey from Illinois to Flagstaff. 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 into for flights to Flagstaff from Illinois?

    Located just 4.3 mi from the city center, Flagstaff Pulliam (FLG) is the airport most travelers will use when flying to Flagstaff from Illinois.

  • How long is the flight from Illinois to Flagstaff?

    Airlines like American Airlines fly from Illinois to Flagstaff in about 7h 55m. The time it takes to get you to your destination can typically vary by up to . The distance between Illinois and Flagstaff is about 1362 mi.

  • What are the most popular routes from Illinois to Flagstaff?

    While some choose either Lambert-St Louis - Flagstaff Pulliam or Evansville Dress Regional - Flagstaff Pulliam, Chicago O'Hare Intl - Flagstaff Pulliam is the most popular route from Illinois to Flagstaff.

  • Can I find deals for flights from Illinois to Flagstaff that include hotel bookings?

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Illinois to Flagstaff (average of $516). Flying from Illinois to Flagstaff in March is currently the most expensive (average of $657). 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

Traveling to a place near Flagstaff?

Book flights to Flagstaff if you plan to visit one of these locations
Williams
Winslow

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Alternative routes for Illinois to Flagstaff

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Illinois to Flagstaff

Discover the top airline that operate flights from Illinois to Flagstaff. 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 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$465Average$641FlexibilityNo cancel feeOn-time71%

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