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Portland

$120+ Cheap flights from Illinois to Portland (PDX)

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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PDX
Jul 25 — Aug 11
Sat 7/25
Sat 8/1
1 adult, Economy
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Cheap flight deals from Illinois to Portland

Cheapest flights from Illinois to Portland
Explore the most affordable flight options available from Illinois to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 25, 2026.

This CheapOair deal was found by Cheapflights users on 6/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/57:03 pm
STL
-
PDX
1 stop25h 01m
Frontier
Wed 8/125:21 pm
PDX
-
STL
1 stop24h 02m
Frontier
Deal found 6/21$275
This Mytrip deal was found by Cheapflights users on 6/22. 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.
Wed 10/218:10 pm
STL
-
PDX
1 stop22h 25m
Frontier
Mon 10/269:34 pm
PDX
-
STL
1 stop23h 05m
Frontier
Deal found 6/22$285
This CheapOair deal was found by Cheapflights users on 6/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:10 pm
STL
-
PDX
1 stop22h 25m
Frontier
Mon 9/219:34 pm
PDX
-
STL
1 stop12h 17m
Frontier
Deal found 6/21$286
This CheapOair deal was found by Cheapflights users on 6/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/167:10 pm
STL
-
PDX
1 stop23h 44m
Frontier
Mon 7/205:49 pm
PDX
-
STL
1 stop22h 16m
Frontier
Deal found 6/25$289
This American Airlines deal was found by Cheapflights users on 6/24. 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 9/124:57 pm
MLI
-
PDX
1 stop9h 10m
American Airlines
Sat 9/196:00 am
PDX
-
MLI
1 stop8h 03m
American Airlines
Deal found 6/24$291
This Travelocity deal was found by Cheapflights users on 6/20. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:08 pm
STL
-
PDX
Nonstop4h 12m
Multiple Airlines
Mon 9/219:34 pm
PDX
-
STL
1 stop12h 17m
Multiple Airlines
Deal found 6/20$294
This Travelocity deal was found by Cheapflights users on 6/25. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:08 pm
STL
-
PDX
Nonstop4h 12m
Multiple Airlines
Sun 9/139:34 pm
PDX
-
STL
1 stop12h 17m
Multiple Airlines
Deal found 6/25$299
This Booking.com deal was found by Cheapflights users on 6/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/79:57 pm
ORD
-
PDX
1 stop20h 39m
Frontier
Sat 7/1112:20 pm
PDX
-
ORD
1 stop6h 32m
Frontier
Deal found 6/22$309
This Southwest deal was found by Cheapflights users on 6/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:30 am
STL
-
PDX
Nonstop4h 10m
Southwest
Sat 8/2210:45 pm
PDX
-
STL
1 stop11h 05m
Southwest
Deal found 6/23$309
This Frontier deal was found by Cheapflights users on 6/21. 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.
Mon 7/277:15 am
ORD
-
PDX
1 stop11h 39m
Frontier
Thu 8/66:49 pm
PDX
-
ORD
1 stop8h 48m
Frontier
Deal found 6/21$310
This CheapOair deal was found by Cheapflights users on 6/24. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/39:48 pm
ORD
-
PDX
1 stop21h 09m
Frontier
Sat 7/1112:20 pm
PDX
-
ORD
1 stop6h 32m
Frontier
Deal found 6/24$311
This CheapOair deal was found by Cheapflights users on 6/24. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/37:38 pm
STL
-
PDX
1 stop23h 19m
Frontier
Fri 7/105:49 pm
PDX
-
STL
1 stop22h 26m
Frontier
Deal found 6/24$311

Find flight deals from Illinois to Portland

Keep the following information in mind while searching for Illinois to Portland flight deals. Data was last updated June 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$275
(CheapOair)

One-way from

$120
(Frontier)

Popular in

March

Cheapest in

January

Average price

$373

Good round-trip deal

$315 or less

Good one-way deal

$168 or less
Provider with most accurate pricing for Chicago (CHI)-Portland flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Portland flights.
Search Deals
From Illinois to Portland
Search Deals
One-way flight from Illinois to Portland
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Illinois to Portland.
Search Deals
Price to beat on a one-way flight from Illinois to Portland.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Portland 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 June 25, 2026.
Use the filters below to find and compare flights from Illinois to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MolinePortland

MLI - PDX

MLIPDX

Moline Quad-City

Tue 9/15

5:00 pm-10:52 pm

1 stop7h 52m

Portland

Sat 9/26

11:30 pm-10:12 am

1 stop8h 42m

$291

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 8/15

8:30 am-10:40 am

Nonstop4h 10m

Portland

Sat 8/22

10:45 pm-11:50 am

1 stop11h 05m

$309

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 9/8

5:00 pm-10:31 pm

1 stop7h 31m

Portland

Tue 9/15

5:10 pm-12:44 am

1 stop5h 34m

$319

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 7/25

7:20 am-9:45 am

Nonstop4h 25m

Portland

Sat 8/1

10:59 pm-5:00 am

Nonstop4h 01m

$325
Quickest round-trip

ChicagoPortland

MDW - PDX

MDWPDX

Chicago Midway

Tue 8/11

8:55 pm-11:10 pm

Nonstop4h 15m

Portland

Tue 8/18

11:30 pm-5:25 am

Nonstop3h 55m

$325

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 8/5

5:35 am-3:25 pm

2 stops11h 50m

Portland

Wed 8/12

5:50 am-3:05 pm

1 stop7h 15m

$330

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 8/8

8:20 pm-7:37 am

1 stop13h 17m

Portland

Sat 8/15

10:59 pm-5:00 am

Nonstop4h 01m

$335

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 9/19

2:22 pm-4:50 pm

Nonstop4h 28m

Portland

Sat 9/26

7:55 am-7:21 pm

1 stop9h 26m

$335

ChicagoPortland

MDW - PDX

MDWPDX

Chicago Midway

Tue 7/21

5:05 am-10:00 am

1 stop6h 55m

Portland

Tue 7/28

11:30 pm-5:20 am

Nonstop3h 50m

$335

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 8/15

7:20 am-9:45 am

Nonstop4h 25m

Portland

Tue 8/18

7:32 am-6:57 pm

1 stop9h 25m

$335

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/21

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Illinois to Portland

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

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

Currently, October is the cheapest month in which you can book a flight from Illinois to Portland (average of $99). Flying from Illinois to Portland in August is currently the most expensive (average of $979). 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 IL to PDX?

Find hourly flight availability from Illinois to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 25, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 15% on flights from Illinois to Portland by exploring options for tickets in the evening.

Weekly flight availability from Illinois to Portland

Explore weekly flight availability from Illinois to Portland. 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 June 25, 2026.

The most flights from USIL to PDX are scheduled on a Thursday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 on average).

How much does it cost to fly round-trip from Illinois to Portland?

How far ahead should I book a flight from Illinois to Portland?

To ensure you get the cheapest price possible for a flight from Illinois to Portland, you should look to book at least 63 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Use this chart to determine the cheapest time to fly round-trip from Illinois to Portland. Price data was last updated on June 20, 2026.

Travelers seeking maximum savings on their Illinois to Portland flight should consider departing on Saturday afternoons 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.

Related info for your journey

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

    For a flight from Illinois to Portland, you will be flying into Portland. Portland (PDX) is just 6.0 mi from the center of the city.

  • How long is the flight from Illinois to Portland?

    A quick flight from Illinois to Portland can take about 4h 10m. Southwest provides one of the quickest options available for as low as $309. There are 1702 mi between Illinois and Portland. Both multi-stop and nonstop flights can be found to your destination and back.

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

    To fly one-way, consider booking your trip with Hawaiian Airlines, which is currently one of the cheapest options available, starting at $52. Frontier flights start at $82 while deals on Southwest start at $89 one-way.

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

    When deciding which route to take from Illinois to Portland consider Chicago O'Hare Intl - Portland, Chicago Midway - Portland or Lambert-St Louis - Portland as they are the most popular.

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

    Before booking your flight to Portland from Illinois, check out the most reliable airlines to get you to your destination on time: Hawaiian Airlines (100%), Alaska Airlines (81%), Air Canada( 78%).

  • What are the cheapest flights from Illinois to Portland?

    Looking for the cheapest flight from Illinois to Portland? While on average our users pay $650, our data indicates the cheapest price to be $152. The most popular route (Chicago O'Hare Intl - Portland), is priced around $289.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Illinois to Portland (average of $99). Flying from Illinois to Portland in August is currently the most expensive (average of $979). 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

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Seaside
Beaverton
Vancouver
Lincoln City
Longview
Lake Oswego
Hillsboro
Clackamas
Troutdale
Cannon Beach
Long Beach
McMinnville
The Dalles
Wilsonville
Depoe Bay
Stevenson
Tillamook
Astoria
Gresham
Silverton

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Portland

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

Discover the top 7 airlines that operate flights from Illinois to Portland. 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 June 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$124Average$238FlexibilityNo cancel feeOn-time85%
FrontierCheapest$150Average$250FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$191Average$218FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$196Average$321FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$202Average$463FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$205Average$388FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$227Average$372FlexibilityNo cancel feeOn-time63%

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