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$350+ Cheap flights from Waterloo, IA (ALO) to Illinois

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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — ORD
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Waterloo to Illinois

Keep the following information in mind while searching for Waterloo to Illinois flight deals. Data was last updated September 16, 2025.

Round-trip from

$374
(American Airlines)

One-way from

$350
(American Airlines)

Good round-trip deal

$333 or less

Good one-way deal

$240 or less
From Waterloo to Illinois
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One-way flight from Waterloo to Illinois
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Price to beat on a round-trip flight from Waterloo to Illinois.
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Price to beat on a one-way flight from Waterloo to Illinois.
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Find flight deals from Waterloo to Illinois

Cheapest flights from Waterloo to Illinois
Explore the most affordable flight options available from Waterloo to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This American Airlines deal was found by Cheapflights users on 9/16. 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 10/14:59 pmALO - STL
1 stop3h 33mAmerican Airlines
Sun 10/58:03 pmSTL - ALO
1 stop3h 38mAmerican Airlines
Deal found 9/16$374
This American Airlines deal was found by Cheapflights users on 9/15. 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 9/204:59 pmALO - ORD
Nonstop1h 29mAmerican Airlines
Sat 9/273:15 pmORD - ALO
Nonstop1h 14mAmerican Airlines
Deal found 9/15$423
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 9/156:01 amALO - ORD
Nonstop1h 24mAmerican Airlines
Sun 10/191:44 pmORD - ALO
Nonstop1h 11mAmerican Airlines
Deal found 9/14$470
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/16:00 amALO - ORD
Nonstop1h 24mAmerican Airlines
Sun 10/51:52 pmORD - ALO
Nonstop1h 16mAmerican Airlines
Deal found 9/16$473
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/106:00 amALO - ORD
Nonstop1h 26mAmerican Airlines
Sun 10/121:44 pmORD - ALO
Nonstop1h 11mAmerican Airlines
Deal found 9/16$499
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Sun 9/283:38 pmALO - ORD
Nonstop1h 29mAmerican Airlines
Fri 10/38:45 pmORD - ALO
Nonstop1h 20mAmerican Airlines
Deal found 9/14$533
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 9/293:38 pmALO - ORD
Nonstop1h 29mAmerican Airlines
Fri 10/33:15 pmORD - ALO
Nonstop1h 14mAmerican Airlines
Deal found 9/14$791

Cheapflights Fare Finder

 
Customize your flight search to find flights from Waterloo to Illinois 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 September 16, 2025.
Use the filters below to find and compare flights from Waterloo to Illinois that are best for you.

Fly from

Waterloo

Fly to

Illinois

Route

Depart

Return

Price

WaterlooSt. Louis

ALO - STL

ALOSTL

Waterloo

Wed 10/1

4:59 pm-8:32 pm

1 stop3h 33m

Lambert-St Louis

Sun 10/5

8:03 pm-11:41 pm

1 stop3h 38m

$374

WaterlooChicago

ALO - ORD

ALOORD

Waterloo

Tue 9/30

6:00 am-7:24 am

Nonstop1h 24m

Chicago O'Hare Intl

Sat 10/4

3:15 pm-4:29 pm

Nonstop1h 14m

$423

WaterlooChicago

ALO - ORD

ALOORD

Waterloo

Sun 10/12

6:00 am-7:26 am

Nonstop1h 26m

Chicago O'Hare Intl

Sun 10/19

1:44 pm-2:55 pm

Nonstop1h 11m

$470

WaterlooChicago

ALO - ORD

ALOORD

Waterloo

Wed 10/1

6:00 am-7:24 am

Nonstop1h 24m

Chicago O'Hare Intl

Sun 10/5

1:52 pm-3:08 pm

Nonstop1h 16m

$473

WaterlooChicago

ALO - ORD

ALOORD

Waterloo

Fri 10/10

6:00 am-7:26 am

Nonstop1h 26m

Chicago O'Hare Intl

Sun 10/12

1:44 pm-2:55 pm

Nonstop1h 11m

$499

WaterlooChicago

ALO - ORD

ALOORD

Waterloo

Sun 9/28

3:38 pm-5:07 pm

Nonstop1h 29m

Chicago O'Hare Intl

Fri 10/3

8:45 pm-10:05 pm

Nonstop1h 20m

$533

WaterlooChicago

ALO - ORD

ALOORD

Waterloo

Mon 9/29

3:38 pm-5:07 pm

Nonstop1h 29m

Chicago O'Hare Intl

Fri 10/3

3:15 pm-4:29 pm

Nonstop1h 14m

$791

WaterlooChicago

ALO - ORD

ALOORD

Waterloo

Sun 10/12

6:00 am-7:26 am

Nonstop1h 26m

Chicago O'Hare Intl

Sun 10/12

10:19 pm-11:38 pm

Nonstop1h 19m

$791

WaterlooChicago

ALO - ORD

ALOORD

Waterloo

Sat 12/13

6:00 am-7:30 am

Nonstop1h 30m

$350

WaterlooChicago

ALO - ORD

ALOORD

Waterloo

Sat 11/15

3:28 pm-4:58 pm

Nonstop1h 30m

$350

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 14 results
1
2

Best time to book a flight from Waterloo to Illinois

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

What is the cheapest month to book a flight from Waterloo, Iowa to Illinois?

Currently, August is the cheapest month in which you can book a flight from Waterloo, Iowa to Illinois (average of $245). Flying from Waterloo, Iowa to Illinois in March is currently the most expensive (average of $321). 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 ALO to IL?

Find hourly flight availability from Waterloo to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

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

Weekly flight availability from Waterloo, Iowa to Illinois

Explore weekly flight availability from Waterloo to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 16, 2025.

The most flights from ALO to USIL are scheduled on a Monday (3 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated September 16, 2025.
Get a feel of what it's like to fly with American Airlines from Waterloo to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Comfort

7.2

Food

6.4

Crew

8.0

Boarding

7.5

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Comfort

7.2

Food

6.4

Crew

8.0

Boarding

7.5

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.

Related info for your journey

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

    For a flight from Waterloo to Illinois, you will be flying from Waterloo. Waterloo (ALO) is just 5.3 mi from the center of the city.

  • How long is the flight from Waterloo, Iowa to Illinois?

    There are many flights that can get you from Waterloo, Iowa to Illinois in 3h 33m. Fly via American Airlines to get the fastest option. Airlines will cover a distance of 283 mi.

  • What are the most reliable airlines from Waterloo, Iowa to Illinois?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Waterloo, Iowa to Illinois on time: Qatar Airways (69%), American Airlines (62%), Envoy Air (62%).

  • What are the cheapest flights from Waterloo, Iowa to Illinois?

    While on average a flight from Waterloo, Iowa to Illinois is generally $383, our data shows the cheapest flight currently is $240. When looking at the most popular route, (Waterloo - Chicago O'Hare Intl), you can expect to pay $421 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Waterloo to Illinois 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 Waterloo, Iowa to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Waterloo, Iowa to Illinois (average of $245). Flying from Waterloo, Iowa to Illinois in March is currently the most expensive (average of $321). 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.

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Top airline flying from Waterloo to Illinois

Discover the top airline that operate flights from Waterloo to Illinois. 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$324Average$383FlexibilityNo cancel feeOn-time71%

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