$378 Find Cheap Flights from Flagstaff to Illinois - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Flagstaff to Illinois departing on 9/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Book Cheap Flagstaff to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Flagstaff to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Flagstaff to Illinois

Tue, Oct 13 - Wed, Oct 28
American Airlines Logo
12:45 pm - 9:30 pmFLG  Flagstaff Pulliam-ORD Chicago O'Hare Intl
6h 45m1 stop Dallas/Fort Worth
American Airlines Logo
6:55 am - 12:05 pmORD  Chicago O'Hare Intl-FLG Flagstaff Pulliam
7h 10m1 stop Dallas/Fort Worth
$508American Airlines
Thu, Oct 15 - Tue, Oct 20
American Airlines Logo
12:45 pm - 10:10 pmFLG  Flagstaff Pulliam-ORD Chicago O'Hare Intl
7h 25m1 stop Dallas/Fort Worth
American Airlines Logo
2:50 pm - 7:49 pmORD  Chicago O'Hare Intl-FLG Flagstaff Pulliam
6h 59m1 stop Dallas/Fort Worth
$538American Airlines
Sat, Sep 12 - Sat, Sep 19
American Airlines Logo
9:50 am - 8:29 pmFLG  Flagstaff Pulliam-ORD Chicago O'Hare Intl
8h 39m1 stop Dallas/Fort Worth
American Airlines Logo
5:00 am - 11:13 amORD  Chicago O'Hare Intl-FLG Flagstaff Pulliam
8h 13m1 stop Phoenix Sky Harbor Intl
$598American Airlines
Thu, Dec 24 - Sat, Jan 2
American Airlines Logo
11:46 am - 8:40 pmFLG  Flagstaff Pulliam-ORD Chicago O'Hare Intl
7h 54m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
5:00 am - 11:01 amORD  Chicago O'Hare Intl-FLG Flagstaff Pulliam
7h 01m1 stop Phoenix Sky Harbor Intl
$608American Airlines
Thu, Oct 15 - Tue, Oct 20
American Airlines Logo
12:45 pm - 11:00 pmFLG  Flagstaff Pulliam-ORD Chicago O'Hare Intl
8h 15m1 stop Dallas/Fort Worth
American Airlines Logo
12:11 pm - 8:39 pmORD  Chicago O'Hare Intl-FLG Flagstaff Pulliam
10h 28m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
$613American Airlines
Fri, Aug 28 - Tue, Sep 1
American Airlines Logo
12:35 pm - 11:30 pmFLG  Flagstaff Pulliam-ORD Chicago O'Hare Intl
8h 55m1 stop Dallas/Fort Worth
American Airlines Logo
5:00 am - 9:49 amORD  Chicago O'Hare Intl-FLG Flagstaff Pulliam
6h 49m1 stop Phoenix Sky Harbor Intl
$616American Airlines
Fri, Aug 28 - Mon, Aug 31
American Airlines Logo
11:42 am - 10:00 pmFLG  Flagstaff Pulliam-ORD Chicago O'Hare Intl
8h 18m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
7:00 am - 11:54 amORD  Chicago O'Hare Intl-FLG Flagstaff Pulliam
6h 54m1 stop Dallas/Fort Worth
$646American Airlines
Thu, Aug 27 - Mon, Aug 31
American Airlines Logo
12:35 pm - 9:16 pmFLG  Flagstaff Pulliam-ORD Chicago O'Hare Intl
6h 41m1 stop Dallas/Fort Worth
American Airlines Logo
6:59 am - 1:20 pmORD  Chicago O'Hare Intl-FLG Flagstaff Pulliam
8h 21m1 stop Phoenix Sky Harbor Intl
$646American Airlines
Booking Insights

KAYAK's insights & trends for Flagstaff to Illinois flights

Get data-powered insights and trends into flights from Flagstaff to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Flagstaff to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Flagstaff to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Flagstaff to Illinois is March, when tickets cost $0 (return) on average. On the other hand, the most expensive months are January and December, when the average cost of round-trip tickets is $810 and $715 respectively.

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Good to know

Cheapest flight

$378
Flight from Flagstaff to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Flagstaff to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Flagstaff to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Flagstaff to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Flagstaff to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Flagstaff to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Flagstaff to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Flagstaff to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Flagstaff to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Flagstaff to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Flagstaff to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Flagstaff to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11941 reviews
7.5Boarding
7.2Comfort
7.9Crew
6.8Entertainment
6.4Food
Airline reviews

We landed slightly early but then sat in holding area waiting for our gate to clear out for about an hour, so technically we arrived one hour late at the gate at ORD. The airport may be partially responsible here, but regardless of who is responsible, it was a bad experience to be so close yet unable to get off the plane.

6.0 GoodAnonymous, Aug 2026
Read more American Airlines reviews

We landed slightly early but then sat in holding area waiting for our gate to clear out for about an hour, so technically we arrived one hour late at the gate at ORD. The airport may be partially responsible here, but regardless of who is responsible, it was a bad experience to be so close yet unable to get off the plane.

Delays and cancellations. Mechanics weren’t on site. Replacement plane took hours to arrive although it should have arrived within 90 minutes. Flight back was cancelled. Ended up driving over 12 hours and wasting 3 days between everything.

Little bit of trouble getting my KTN and pre-check status onto the ticket, but otherwise the counter staff were friendly and truly concerned to get it right.

The flight could have actually taken place. Canceled flight and no option to rebook that day.

Food is what you expect on a plane. Nothing gluten free. But that is expected. Drinks, apple juice, was fine. Seat, what I expected. Fine.

I'm not sure American is capable of on-time arrivals and departures. When you land at ORD, you almost always get held on the tarmac because your gate is still occupied. I may have missed my connection, but that ended up up being significantly delayed as well. Once again, I finally got home well after midnight.

I liked the humor of the captain and crew on the flight from Flagstaff to Dallas. They were humorous.

Delayed delayed delayed and no offer for food or vouchers

Turn on the heat. Flight was way too cold from Arizona to Chicago.

Overall pleasant was delayed and caused transportation issue when landing

Everything you need to know for your flight from Flagstaff to Illinois

Information on your arrival and departure airports

Flagstaff (FLG)