What airlines fly to Illinois?

American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Illinois from Oklahoma according to our data. American Airlines is the first choice among our users, with 61% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Oklahoma to Illinois?

Frontier, Spirit Airlines, and American Airlines are the most popular carriers operating from Oklahoma to Illinois

How long is the flight from Oklahoma to Illinois?

The flight from Oklahoma to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Tulsa (a popular airport in Oklahoma) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 2h 02m on average. If you fly from Oklahoma City (another popular airport in Oklahoma) to Chicago O'Hare Intl Airport, then the average flight time is 2h 13m.

How many flights depart from Oklahoma to Illinois on average per week?

As of July 2025, there are 1,198 flights per week flying from Oklahoma to Illinois. The most common day of the week flights depart is Thu, with 18% of flights taking off on this day.

How many flights depart from Oklahoma to Illinois on average per day?

As of July 2025, there are 171 flights per day flying from Oklahoma to Illinois. The most common time of day flights depart is 7:00AM, with 44% of flights taking off at noon.

When did momondo last update prices for flights from Oklahoma to Illinois?

Prices for flights from Oklahoma to Illinois refresh daily.

How many operators does momondo search for flights from Oklahoma to Illinois?

There are 6 operators available for flights from Oklahoma to Illinois as of July 2025.

How old do you have to be to fly from Oklahoma to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Oklahoma to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$31 Cheap Flights from Oklahoma to Illinois in 2025

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Find the cheapest flights from Oklahoma to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

3:00 pm - 4:52 pmDFW-STL

1h 52mnonstop

9:47 am - 11:44 amSTL-DFW

1h 57mnonstop

$50Frontier

Find Deal

Fri, Oct 10 - Sun, Oct 12

7:25 am - 9:18 amDFW-STL

1h 53mnonstop

10:17 am - 12:13 pmSTL-DFW

1h 56mnonstop

$51Frontier

Find Deal

Thu, Aug 21 - Sun, Aug 24

7:20 am - 9:44 amDFW-ORD

2h 24mnonstop

10:05 pm - 12:34 amORD-DFW

2h 29mnonstop

$100Spirit Airlines

Find Deal

Sat, Nov 8 - Tue, Nov 11

9:28 pm - 11:50 pmDFW-ORD

2h 22mnonstop

10:05 pm - 12:34 amORD-DFW

2h 29mnonstop

$105Spirit Airlines

Find Deal

Mon, Oct 27 - Tue, Nov 11

4:35 pm - 6:22 pmDFW-STL

1h 47mnonstop

7:16 am - 9:14 amSTL-DFW

1h 58mnonstop

$139American Airlines

Find Deal

Sat, Sep 20 - Tue, Sep 23

4:50 pm - 6:36 pmDFW-STL

1h 46mnonstop

5:02 pm - 6:58 pmSTL-DFW

1h 56mnonstop

$169American Airlines

Find Deal

Wed, Oct 15 - Mon, Oct 20

3:15 pm - 5:10 pmOKC-MDW

1h 55mnonstop

7:25 pm - 9:25 pmMDW-OKC

2h 00mnonstop

$217Southwest

Find Deal

Tue, Sep 9 - Sat, Sep 13

3:15 pm - 5:10 pmOKC-MDW

1h 55mnonstop

8:25 pm - 10:25 pmMDW-OKC

2h 00mnonstop

$223Southwest

Find Deal

Tue, Aug 26 - Thu, Aug 28

4:10 pm - 6:27 pmOKC-ORD

2h 17mnonstop

7:46 pm - 10:15 pmORD-OKC

2h 29mnonstop

$235United Airlines

Find Deal

Wed, Aug 27 - Wed, Sep 3

4:10 pm - 6:27 pmOKC-ORD

2h 17mnonstop

7:46 pm - 10:15 pmORD-OKC

2h 29mnonstop

$293United Airlines

Find Deal

Wed, Sep 24 - Mon, Sep 29

Frontier flights from Oklahoma to Illinois

Our best Frontier deals on Oklahoma to Illinois flight tickets

Frontier

Oct 10

DFW3:00 pmDallas/Fort Worth

1h 52m

STL4:52 pmLambert-St Louis

Oct 12

STL9:47 amLambert-St Louis

1h 57m

DFW11:44 amDallas/Fort Worth

$50

Find similar

Frontier

Aug 21

DFW7:25 amDallas/Fort Worth

1h 53m

STL9:18 amLambert-St Louis

Aug 24

STL10:17 amLambert-St Louis

1h 56m

DFW12:13 pmDallas/Fort Worth

$51

Find similar

Frontier

Sep 28

DFW9:27 pmDallas/Fort Worth

2h 31m

ORD11:58 pmChicago O'Hare Intl

Oct 1

ORD6:44 pmChicago O'Hare Intl

2h 55m

DFW9:39 pmDallas/Fort Worth

$54

Find similar

American Airlines flights from Oklahoma to Illinois

Our best American Airlines deals on Oklahoma to Illinois flight tickets

American Airlines

Sep 20

DFW4:35 pmDallas/Fort Worth

1h 47m

STL6:22 pmLambert-St Louis

Sep 23

STL7:16 amLambert-St Louis

1h 58m

DFW9:14 amDallas/Fort Worth

$139

Find similar

American Airlines

Oct 15

DFW4:50 pmDallas/Fort Worth

1h 46m

STL6:36 pmLambert-St Louis

Oct 20

STL5:02 pmLambert-St Louis

1h 56m

DFW6:58 pmDallas/Fort Worth

$169

Find similar

American Airlines

Nov 1

DFW4:45 pmDallas/Fort Worth

1h 44m

STL6:29 pmLambert-St Louis

Nov 2

STL7:00 amLambert-St Louis

2h 10m

DFW9:10 amDallas/Fort Worth

$192

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Fri 10/10

3:00 pm-4:52 pm

Nonstop1h 52m

Lambert-St Louis

Sun 10/12

9:47 am-11:44 am

Nonstop1h 57m

$50

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Thu 8/21

7:25 am-9:18 am

Nonstop1h 53m

Lambert-St Louis

Sun 8/24

10:17 am-12:13 pm

Nonstop1h 56m

$51

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

Sat 11/8

7:20 am-9:44 am

Nonstop2h 24m

Chicago O'Hare Intl

Tue 11/11

10:05 pm-12:34 am

Nonstop2h 29m

$100

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

Mon 10/27

9:28 pm-11:50 pm

Nonstop2h 22m

Chicago O'Hare Intl

Tue 11/11

10:05 pm-12:34 am

Nonstop2h 29m

$105

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Sat 9/20

4:35 pm-6:22 pm

Nonstop1h 47m

Lambert-St Louis

Tue 9/23

7:16 am-9:14 am

Nonstop1h 58m

$139

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Wed 10/15

4:50 pm-6:36 pm

Nonstop1h 46m

Lambert-St Louis

Mon 10/20

5:02 pm-6:58 pm

Nonstop1h 56m

$169

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Tue 9/9

3:15 pm-5:10 pm

Nonstop1h 55m

Chicago Midway

Sat 9/13

7:25 pm-9:25 pm

Nonstop2h 00m

$217

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Tue 8/26

3:15 pm-5:10 pm

Nonstop1h 55m

Chicago Midway

Thu 8/28

8:25 pm-10:25 pm

Nonstop2h 00m

$223

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Wed 8/27

4:10 pm-6:27 pm

Nonstop2h 17m

Chicago O'Hare Intl

Wed 9/3

7:46 pm-10:15 pm

Nonstop2h 29m

$235

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Wed 9/24

4:10 pm-6:27 pm

Nonstop2h 17m

Chicago O'Hare Intl

Mon 9/29

7:46 pm-10:15 pm

Nonstop2h 29m

$293

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Oklahoma to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Oklahoma is in February. Flight prices, which tend to average around $323, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $328.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Oklahoma to Illinois is on a Saturday when prices can be found for as low as $555. Flights from Oklahoma to Illinois on a Sunday will generally be more expensive and average around $794. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Oklahoma to Illinois during this time can be as low as $536. Flights at noon are often more expensive with an average ticket price of $965.

What is the cheapest Oklahoma to Illinois flight route?

Fly from Oklahoma City Will Rogers World to Chicago Midway for the best Oklahoma - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Oklahoma when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $356 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Oklahoma for as low as $293 on momondo.

What cabin class options are available on Oklahoma to Illinois flights?

There are 4 cabin classes available to choose from on Oklahoma to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Oklahoma to Illinois flights?

No. A direct flight is the cheapest option for a flight between Oklahoma to Illinois.

Cheap Oklahoma to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Oklahoma to Illinois

Best Price Found	$31
Fastest flight time	1h 42m
Direct flights	Every day
Airports in Illinois	3 airports

The best one-way flight to Illinois from Oklahoma in the past 72 hours is $31. The best round-trip flight deal from Oklahoma to Illinois found on momondo in the last 72 hours is $50.

The fastest flight from Oklahoma to Illinois takes 1h 42m

Direct flights go from Oklahoma to Illinois every day.

There are 3 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL)

Search flight deals

When did momondo last update prices for flights from Oklahoma to Illinois?
Prices for flights from Oklahoma to Illinois refresh daily.
How many operators does momondo search for flights from Oklahoma to Illinois?
There are 6 operators available for flights from Oklahoma to Illinois as of July 2025.
How old do you have to be to fly from Oklahoma to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Oklahoma to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Oklahoma to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Oklahoma to Illinois is Embraer 175 (Enhanced Winglets), representing 20.38% of all bookings. The subsequent popular models are Canadair (Bombardier) Regional Jet 700 at 18.12%, Canadair (Bombardier) Regional Jet CRJ-550 at 17.12%, and Boeing 737-700 Passenger/BBJ1 (winglets) at 9.75%.

Best airlines flying from Oklahoma to Illinois

Compare and see reviews for airlines that fly from Oklahoma to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $118	Free Cancellation	Rating 5.9 3,239 reviews	Search Frontier flights
American Airlines	PriceFrom $190	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $197	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest flights
United Airlines	PriceFrom $243	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Oklahoma to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Oklahoma to Illinois for you.

Can I find flights from Oklahoma to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from Oklahoma which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Oklahoma to Illinois?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Oklahoma to Illinois.

I’m not ready to book a flight from Oklahoma to Illinois right now. Can momondo alert me if prices change?

Price alerts on flights to Illinois from Oklahoma are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Illinois trip

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Find better results for your trip to Illinois

Popular cities in Illinois

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Flights to Seattlefrom $93

Cheap flights from Oklahoma to Illinois from $31

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Oklahoma to Illinois departing on 10/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Find the cheapest flights from Oklahoma to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Frontier flights from Oklahoma to Illinois

Our best Frontier deals on Oklahoma to Illinois flight tickets

American Airlines flights from Oklahoma to Illinois

Our best American Airlines deals on Oklahoma to Illinois flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Oklahoma to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from Oklahoma to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Oklahoma to Illinois during this time can be as low as $536. Flights at noon are often more expensive with an average ticket price of $965.

What is the cheapest Oklahoma to Illinois flight route?

Fly from Oklahoma City Will Rogers World to Chicago Midway for the best Oklahoma - Illinois flight prices

How far in advance should I book a flight to Illinois?

What cabin class options are available on Oklahoma to Illinois flights?

There are 4 cabin classes available to choose from on Oklahoma to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Oklahoma to Illinois flights?

No. A direct flight is the cheapest option for a flight between Oklahoma to Illinois.

What is the cheapest airline that flies from Oklahoma to Illinois?

Frontier, Spirit Airlines, and American Airlines are the most popular carriers operating from Oklahoma to Illinois

What airlines fly to Illinois?

How many flights depart from Oklahoma to Illinois on average per day?

As of July 2025, there are 171 flights per day flying from Oklahoma to Illinois. The most common time of day flights depart is 7:00AM, with 44% of flights taking off at noon.

How many flights depart from Oklahoma to Illinois on average per week?

As of July 2025, there are 1,198 flights per week flying from Oklahoma to Illinois. The most common day of the week flights depart is Thu, with 18% of flights taking off on this day.

How long is the flight from Oklahoma to Illinois?

Cheap Oklahoma to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Oklahoma to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Oklahoma to Illinois?

How many operators does momondo search for flights from Oklahoma to Illinois?

How old do you have to be to fly from Oklahoma to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model from Oklahoma to Illinois?

Best airlines flying from Oklahoma to Illinois

Compare and see reviews for airlines that fly from Oklahoma to Illinois with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Oklahoma to Illinois?

Can I find flights from Oklahoma to Illinois with flexible booking policies on momondo?

How can momondo help me find flights from Oklahoma to Illinois?

I’m not ready to book a flight from Oklahoma to Illinois right now. Can momondo alert me if prices change?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo