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$54+ Cheap flights from Oregon 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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — ORD
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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Cheap flight deals from Oregon to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Oregon (USOR) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 21, 2024.

Find flight deals from Oregon to Illinois

Cheapest flights from Oregon to Illinois
Explore the most affordable flight options available from Oregon to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This FlightHub deal was found by Cheapflights users on 11/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2611:55 amPDX - ORD
1 stop24h 12mMultiple Airlines
Tue 12/312:57 pmORD - PDX
1 stop12h 42mMultiple Airlines
Deal found 11/20$213
This Gotogate deal was found by Cheapflights users on 11/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/47:35 amPDX - MDW
1 stop14h 38mFrontier
Thu 12/1212:43 pmMDW - PDX
1 stop23h 04mFrontier
Deal found 11/20$213
This Mytrip deal was found by Cheapflights users on 11/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/109:08 amPDX - ORD
2 stops24h 57mSpirit Airlines
Wed 12/116:33 pmORD - PDX
2 stops21h 24mSpirit Airlines
Deal found 11/20$214
This FlightHub deal was found by Cheapflights users on 11/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1711:39 amPDX - ORD
1 stop16h 03mFrontier
Sat 12/214:21 pmORD - PDX
1 stop25h 23mFrontier
Deal found 11/20$216
This Delta deal was found by Cheapflights users on 11/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/103:20 pmPDX - STL
2 stops7h 37mDelta
Wed 12/112:10 pmSTL - PDX
1 stop9h 53mDelta
Deal found 11/19$226
This Delta deal was found by Cheapflights users on 11/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/102:07 pmPDX - ORD
1 stop7h 52mDelta
Tue 12/176:45 pmORD - PDX
1 stop7h 43mDelta
Deal found 11/19$242
This Delta deal was found by Cheapflights users on 11/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/611:10 amBOI - ORD
1 stop5h 52mDelta
Tue 12/177:10 pmORD - BOI
1 stop6h 33mDelta
Deal found 11/20$248
This FlightHub deal was found by Cheapflights users on 11/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2412:45 pmPDX - STL
1 stop17h 28mFrontier
Thu 1/210:09 pmSTL - PDX
1 stop19h 35mFrontier
Deal found 11/19$248
This Mytrip deal was found by Cheapflights users on 11/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1311:57 amBOI - ORD
2 stops20h 41mSpirit Airlines
Sun 12/159:53 pmORD - BOI
1 stop14h 05mSpirit Airlines
Deal found 11/20$260
This United Airlines deal was found by Cheapflights users on 11/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:20 pmBOI - ORD
1 stop5h 31mUnited Airlines
Mon 1/64:00 pmORD - BOI
1 stop6h 33mUnited Airlines
Deal found 11/19$268
This United Airlines deal was found by Cheapflights users on 11/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/244:45 pmPDX - ORD
Nonstop4h 03mUnited Airlines
Wed 1/89:10 amORD - PDX
Nonstop4h 43mUnited Airlines
Deal found 11/20$287
This Alaska Airlines deal was found by Cheapflights users on 11/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/101:51 pmPDX - ORD
1 stop7h 56mAlaska Airlines
Thu 12/197:00 amORD - PDX
Nonstop4h 38mAlaska Airlines
Deal found 11/19$291

Find flights from Oregon to Illinois within your budget

Customize your flight search to find flights from Oregon 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 2,629,791 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PortlandChicago

PDX - MDW

PDXMDW

Portland

Mon 2/10

12:03 pm-12:17 am

1 stop10h 14m

Chicago Midway

Sun 3/2

8:44 pm-8:40 am

1 stop13h 56m

$212

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 2/18

7:35 am-4:33 pm

1 stop6h 58m

Lambert-St Louis

Mon 2/24

5:10 am-1:14 pm

1 stop10h 04m

$212

PortlandChicago

PDX - ORD

PDXORD

Portland

Mon 1/13

7:00 am-1:07 pm

Nonstop4h 07m

Chicago O'Hare Intl

Thu 1/16

10:47 pm-9:21 am

1 stop12h 34m

$213

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 1/29

9:00 am-6:09 pm

1 stop7h 09m

Lambert-St Louis

Sat 2/1

11:30 am-9:00 pm

2 stops11h 30m

$213

PortlandChicago

PDX - ORD

PDXORD

Portland

Tue 12/10

9:08 am-12:05 pm

2 stops24h 57m

Chicago O'Hare Intl

Wed 12/11

6:33 pm-1:57 pm

2 stops21h 24m

$214

PortlandChicago

PDX - ORD

PDXORD

Portland

Sat 2/8

7:05 am-5:59 pm

1 stop8h 54m

Chicago O'Hare Intl

Sat 3/1

4:05 pm-6:44 pm

Nonstop4h 39m

$216

PortlandChicago

PDX - ORD

PDXORD

Portland

Fri 12/13

12:03 pm-12:35 am

1 stop10h 32m

Chicago O'Hare Intl

Wed 12/18

6:00 am-3:44 pm

1 stop11h 44m

$218

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 12/10

3:20 pm-12:57 am

2 stops7h 37m

Lambert-St Louis

Wed 12/11

2:10 pm-10:03 pm

1 stop9h 53m

$226

PortlandChicago

PDX - ORD

PDXORD

Portland

Tue 12/10

2:07 pm-11:59 pm

1 stop7h 52m

Chicago O'Hare Intl

Tue 12/17

6:45 pm-12:28 am

1 stop7h 43m

$242

PortlandChicago

PDX - ORD

PDXORD

Portland

Thu 12/12

11:59 pm-5:48 am

Nonstop3h 49m

Chicago O'Hare Intl

Mon 12/16

6:50 am-1:10 pm

1 stop8h 20m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

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

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

Travel insights for flights from Oregon to Illinois

Get recent, data-driven insights about flights from Oregon to Illinois including ideal travel times, pricing trends, and more.

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

Currently, September is the cheapest month in which you can book a flight from Oregon to Illinois (average of $232). Flying from Oregon to Illinois in June is currently the most expensive (average of $308). 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 OR to IL?

Find hourly flight availability from Oregon 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 November 21, 2024.

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

Weekly flight availability from Oregon to Illinois

Explore weekly flight availability from Oregon 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 November 21, 2024.

The most flights from USOR to USIL are scheduled on a Thursday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 November 21, 2024.
See what other customers who have flown with Spirit Airlines, Alaska Airlines and Frontier from Oregon to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,015 reviews

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,458 reviews
Southwest
8.1
Very good
5,015 reviews

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,759 reviews
Southwest
8.1
Very good
5,015 reviews

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,173 reviews
Southwest
8.1
Very good
5,015 reviews

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Allegiant Air
7.4
Good
850 reviews
Southwest
8.1
Very good
5,015 reviews

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

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

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $54. Users have also found prices from $98 and $99 on Spirit Airlines and United Airlines, respectively.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Oregon to Illinois (average of $232). Flying from Oregon to Illinois in June is currently the most expensive (average of $308). 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 Oregon to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Oregon to Illinois

Discover the top 7 airlines that operate flights from Oregon 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 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$82Average$135FlexibilityNo cancel feeOn-time65%
FrontierCheapest$114Average$239FlexibilityNo cancel feeOn-time62%
DeltaCheapest$158Average$396FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$178Average$480FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$188Average$505FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$219Average$550FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$233Average$446FlexibilityNo cancel feeOn-time63%
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