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$39+ Cheap flights from Durham, NC 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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Durham to Illinois

Cheapest flights from Durham to Illinois
Explore the most affordable flight options available from Durham to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/249:25 pm
RDU
-
STL
1 stop26h 02m
Frontier
Tue 3/33:49 pm
STL
-
RDU
1 stop21h 09m
Frontier
Deal found 1/26$131
This Frontier deal was found by Cheapflights users on 1/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/216:10 am
RDU
-
ORD
1 stop5h 36m
Frontier
Wed 2/256:02 pm
ORD
-
RDU
1 stop5h 09m
Frontier
Deal found 1/28$138
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/206:54 pm
RDU
-
ORD
1 stop16h 52m
Multiple Airlines
Mon 2/236:40 am
ORD
-
RDU
1 stop9h 31m
Multiple Airlines
Deal found 1/27$139
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/186:08 pm
RDU
-
ORD
1 stop7h 32m
Multiple Airlines
Fri 2/205:05 am
ORD
-
RDU
1 stop12h 04m
Multiple Airlines
Deal found 1/28$140
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/249:25 pm
RDU
-
ORD
2 stops28h 15m
Multiple Airlines
Tue 3/36:51 pm
ORD
-
RDU
1 stop21h 20m
Multiple Airlines
Deal found 1/27$141
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2710:07 pm
RDU
-
ORD
Nonstop2h 30m
Multiple Airlines
Sun 3/16:51 pm
ORD
-
RDU
2 stops16h 26m
Multiple Airlines
Deal found 1/27$142
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/166:14 pm
RDU
-
ORD
1 stop16h 08m
Multiple Airlines
Wed 2/1811:51 am
ORD
-
RDU
1 stop6h 44m
Multiple Airlines
Deal found 1/27$143
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:08 pm
RDU
-
ORD
1 stop7h 32m
Multiple Airlines
Tue 2/248:16 pm
ORD
-
RDU
2 stops26h 55m
Multiple Airlines
Deal found 1/28$144
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:10 am
RDU
-
MDW
1 stop17h 15m
Frontier
Tue 2/176:00 am
MDW
-
RDU
1 stop17h 10m
Frontier
Deal found 1/28$144
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:25 am
RDU
-
ORD
1 stop5h 26m
Multiple Airlines
Mon 3/96:04 am
ORD
-
RDU
1 stop7h 43m
Multiple Airlines
Deal found 1/27$145
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/186:25 am
RDU
-
MDW
1 stop13h 42m
Frontier
Thu 2/1912:22 pm
MDW
-
RDU
1 stop10h 48m
Frontier
Deal found 1/28$145
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/66:10 am
RDU
-
STL
1 stop25h 41m
Frontier
Mon 2/168:22 pm
STL
-
RDU
1 stop26h 48m
Frontier
Deal found 1/26$145

Find flight deals from Durham to Illinois

Keep the following information in mind while searching for Durham to Illinois flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$127
(Kiwi.com)

One-way from

$39
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$299
Provider with most accurate pricing for Raleigh-Durham-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Raleigh-Durham-Chicago (CHI) flights.
Search Deals
From Durham to Illinois
Search Deals
One-way flight from Durham to Illinois
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Durham 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 January 29, 2026.
Use the filters below to find and compare flights from Durham to Illinois that are best for you.

Fly from

Durham

Fly to

Illinois

Route

Depart

Return

Price

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 2/24

9:25 pm-10:27 pm

1 stop26h 02m

Lambert-St Louis

Tue 3/3

3:49 pm-1:58 pm

1 stop21h 09m

$131

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Fri 2/27

6:10 am-10:01 pm

2 stops16h 51m

Chicago O'Hare Intl

Mon 3/2

6:51 pm-5:11 pm

1 stop21h 20m

$167

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 2/13

6:54 pm-6:51 am

1 stop12h 57m

Lambert-St Louis

Sun 2/15

3:49 pm-8:37 am

1 stop15h 48m

$171

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Fri 2/27

6:10 am-10:51 am

1 stop5h 41m

Chicago O'Hare Intl

Fri 3/6

8:16 pm-5:11 pm

2 stops19h 55m

$181

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Fri 2/13

6:54 pm-11:22 am

2 stops17h 28m

Chicago O'Hare Intl

Tue 2/17

6:02 pm-7:35 pm

1 stop24h 33m

$189

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Fri 4/10

3:57 pm-5:26 pm

Nonstop2h 29m

Chicago O'Hare Intl

Sun 4/12

4:21 pm-7:56 am

1 stop14h 35m

$199

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Tue 2/24

5:14 pm-6:50 pm

Nonstop2h 36m

Chicago O'Hare Intl

Wed 2/25

8:50 am-2:03 pm

1 stop4h 13m

$225

RaleighChicago

RDU - MDW

RDUMDW

Raleigh-Durham

Tue 3/31

6:30 pm-7:35 pm

Nonstop2h 05m

Chicago Midway

Sat 4/4

6:45 pm-9:35 pm

Nonstop1h 50m

$231

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Wed 2/25

5:14 pm-6:50 pm

Nonstop2h 36m

Chicago O'Hare Intl

Wed 3/4

8:50 am-2:03 pm

1 stop4h 13m

$237

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sun 4/19

4:07 pm-6:50 am

1 stop15h 43m

Lambert-St Louis

Thu 4/23

11:21 am-7:33 am

2 stops19h 12m

$242

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 60 results
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Best time to book a flight from Durham to Illinois

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

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

Currently, January is the cheapest month in which you can book a flight from Durham to Illinois (average of $59). Flying from Durham to Illinois in March is currently the most expensive (average of $199). 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 DU8 to IL?

Find hourly flight availability from Durham 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 January 29, 2026.

A simple way to save on the total cost of your ticket is to fly from Durham to Illinois at noon. If you’re flexible enough to do this you can expect to save up to 40% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Durham to Illinois?

Use this chart to determine the cheapest time to fly round-trip from Durham to Illinois. Price data was last updated on January 24, 2026.

Travelers seeking maximum savings on their Durham to Illinois flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Durham to Illinois

Explore weekly flight availability from Durham 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 January 29, 2026.

The most flights from DU8 to USIL are scheduled on a Monday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 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 January 29, 2026.
See what other customers who have flown with Southwest, Delta, and United Airlines from Durham to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,267 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,267 reviews
Southwest
8.0
Very good
4,267 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,128 reviews
Southwest
8.0
Very good
4,267 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,215 reviews
Southwest
8.0
Very good
4,267 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,205 reviews
Southwest
8.0
Very good
4,267 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,056 reviews
Southwest
8.0
Very good
4,267 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Durham to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Durham to Illinois?

    Departing from Durham to Illinois will take you 2h 05m. The distance between Durham and Illinois is about 631 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Durham to Illinois one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $36. Users have also found prices from $74 and $78 on American Airlines and Spirit Airlines, respectively.

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

    The most popular flight routes from Durham to Illinois are Raleigh-Durham - Chicago O'Hare Intl, Raleigh-Durham - Chicago Midway and Raleigh-Durham - Lambert-St Louis.

  • What are the most reliable airlines from Durham to Illinois?

    No one likes to see their flight delayed. When booking a flight from Durham to Illinois consider choosing Cathay Pacific (90%), Envoy Air (88%) or Qatar Airways (83%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Durham to Illinois?

    Looking at all options, your cheapest flight can be booked for $88. While the most popular route (Raleigh-Durham - Chicago O'Hare Intl) can be booked for $108 on average, our data indicates $889 when flying from Durham to Illinois.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Durham to Illinois (average of $59). Flying from Durham to Illinois in March is currently the most expensive (average of $199). 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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Alternative routes for Durham to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Durham to Illinois

Discover the top 6 airlines that operate flights from Durham 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$69Average$198FlexibilityNo cancel feeOn-time62%
DeltaCheapest$88Average$300FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$151Average$334FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$160Average$293FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$173Average$408FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$177Average$314FlexibilityNo cancel feeOn-time63%

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