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

As of June 2026, there are 28 flights per day flying from Portland to Illinois. The most common time of day flights depart is 1:00PM, with 49% of flights taking off at noon.

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

United Airlines, Delta, and Southwest are the most popular carriers operating from Portland to Illinois

What airlines fly to Illinois?

American Airlines, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Illinois from Portland according to our data. American Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 7 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

The number of flights available between Portland and Illinois is 200 per week as of June 2026. The most frequent departure day is Thu, with 18% of weekly flights leaving on this day.

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

Prices for flights from Portland Airport to Illinois are refreshed on a daily basis.

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

As of June 2026, there are 7 operators available to choose from for flights from Portland Airport to Illinois.

How old do you have to be to fly from Portland Airport to Illinois?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Illinois.

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

The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$126 Cheap Flights from Portland to Illinois in 2026

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Find the cheapest flights from Portland to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:34 pm - 11:51 am

PDX

STL

12h 17m

1 stop

12:46 pm - 8:39 pm

STL

PDX

9h 53m

1 stop

$240Frontier

Fri, Sep 11 - Sun, Sep 13

5:16 pm - 7:23 pm

PDX

STL

24h 07m

1 stop

7:03 pm - 6:04 pm

STL

PDX

25h 01m

1 stop

$250Frontier

Tue, Jul 14 - Wed, Aug 5

12:45 am - 10:39 am

PDX

MLI

7h 54m

1 stop

6:50 pm - 12:50 am

MLI

PDX

8h 00m

1 stop

$320American Airlines

Fri, Jul 24 - Fri, Jul 31

11:30 pm - 5:20 am

PDX

MDW

3h 50mnonstop

8:25 pm - 10:50 pm

MDW

PDX

4h 25mnonstop

$320Southwest

Sat, Jul 18 - Sat, Jul 25

10:40 pm - 4:45 am

PDX

ORD

4h 05mnonstop

5:00 am - 9:47 am

ORD

PDX

6h 47m

1 stop

$325United Airlines

Wed, Jul 29 - Wed, Aug 5

11:30 pm - 5:20 am

PDX

MDW

3h 50mnonstop

5:30 am - 9:45 am

MDW

PDX

6h 15m

1 stop

$325Southwest

Tue, Jul 21 - Tue, Jul 28

11:40 pm - 5:45 am

PDX

ORD

4h 05mnonstop

7:00 am - 9:34 am

ORD

PDX

4h 34mnonstop

$326United Airlines

Wed, Jul 29 - Sun, Aug 2

11:15 pm - 9:17 am

PDX

PIA

8h 02m

1 stop

7:20 pm - 12:50 am

PIA

PDX

7h 30m

1 stop

$332American Airlines

Sat, Jul 18 - Sat, Jul 25

10:57 pm - 9:20 am

PDX

EVV

8h 23m

1 stop

3:46 pm - 9:47 pm

EVV

PDX

8h 01m

1 stop

$419Delta

Tue, Sep 8 - Sat, Sep 12

6:04 am - 3:16 pm

PDX

BMI

7h 12m

1 stop

6:01 am - 1:25 pm

BMI

PDX

9h 24m

1 stop

$479Delta

Wed, Nov 18 - Sat, Nov 21

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United Airlines flights from Portland to Illinois

Our best United Airlines deals on Portland to Illinois flight tickets

United Airlines

Aug 4

PDX4:15 pmPortland

6h 29m

1 stop

ORD12:44 amChicago O'Hare Intl

Aug 8

ORD7:00 amChicago O'Hare Intl

4h 34m

PDX9:34 amPortland

$325

United Airlines

Jul 15

PDX10:40 pmPortland

4h 05m

ORD4:45 amChicago O'Hare Intl

Jul 22

ORD7:00 amChicago O'Hare Intl

4h 34m

PDX9:34 amPortland

$326

United Airlines

Oct 21

PDX2:27 pmPortland

6h 31m

1 stop

PIA10:58 pmGreater Peoria

Oct 27

PIA7:00 amGreater Peoria

6h 35m

1 stop

PDX11:35 amPortland

$331

Delta flights from Portland to Illinois

Our best Delta deals on Portland to Illinois flight tickets

Delta

Jul 14

PDX5:14 pmPortland

5h 27m

1 stop

STL12:41 amLambert-St Louis

Jul 17

STL7:55 pmLambert-St Louis

5h 49m

1 stop

PDX11:44 pmPortland

$319

Delta

Aug 5

PDX6:20 amPortland

9h 20m

1 stop

ORD5:40 pmChicago O'Hare Intl

Aug 18

ORD7:44 pmChicago O'Hare Intl

5h 55m

1 stop

PDX11:39 pmPortland

$335

Delta

Aug 5

PDX6:20 amPortland

9h 20m

1 stop

ORD5:40 pmChicago O'Hare Intl

Aug 23

ORD6:00 amChicago O'Hare Intl

6h 41m

1 stop

PDX10:41 amPortland

$346

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 9/11

9:34 pm-11:51 am

1 stop12h 17m

Lambert-St Louis

Sun 9/13

12:46 pm-8:39 pm

1 stop9h 53m

$240

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 7/14

5:16 pm-7:23 pm

1 stop24h 07m

Lambert-St Louis

Wed 8/5

7:03 pm-6:04 pm

1 stop25h 01m

$250

PortlandMoline

PDX - MLI

PDXMLI

Portland

Fri 7/24

12:45 am-10:39 am

1 stop7h 54m

Moline Quad-City

Fri 7/31

6:50 pm-12:50 am

1 stop8h 00m

$320

Quickest round-trip

PortlandChicago

PDX - MDW

PDXMDW

Portland

Sat 7/18

11:30 pm-5:20 am

Nonstop3h 50m

Chicago Midway

Sat 7/25

8:25 pm-10:50 pm

Nonstop4h 25m

$320

PortlandChicago

PDX - ORD

PDXORD

Portland

Wed 7/29

10:40 pm-4:45 am

Nonstop4h 05m

Chicago O'Hare Intl

Wed 8/5

5:00 am-9:47 am

1 stop6h 47m

$325

PortlandChicago

PDX - MDW

PDXMDW

Portland

Tue 7/21

11:30 pm-5:20 am

Nonstop3h 50m

Chicago Midway

Tue 7/28

5:30 am-9:45 am

1 stop6h 15m

$325

PortlandChicago

PDX - ORD

PDXORD

Portland

Wed 7/29

11:40 pm-5:45 am

Nonstop4h 05m

Chicago O'Hare Intl

Sun 8/2

7:00 am-9:34 am

Nonstop4h 34m

$326

PortlandPeoria

PDX - PIA

PDXPIA

Portland

Sat 7/18

11:15 pm-9:17 am

1 stop8h 02m

Greater Peoria

Sat 7/25

7:20 pm-12:50 am

1 stop7h 30m

$332

PortlandEvansville

PDX - EVV

PDXEVV

Portland

Tue 9/8

10:57 pm-9:20 am

1 stop8h 23m

Evansville Dress Regional

Sat 9/12

3:46 pm-9:47 pm

1 stop8h 01m

$419

PortlandBloomington

PDX - BMI

PDXBMI

Portland

Wed 11/18

6:04 am-3:16 pm

1 stop7h 12m

Bloomington-Normal

Sat 11/21

6:01 am-1:25 pm

1 stop9h 24m

$479

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 Portland 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 Portland is in November. Flight prices, which tend to average around $103, 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 November, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $114.

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

The cheapest day to depart from Portland to Illinois is on a Wednesday when prices can be found for as low as $427. Flights from Portland to Illinois on a Monday will generally be more expensive and average around $525. 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 afternoon. Flights from Portland to Illinois during this time can be as low as $347. Flights in the morning are often more expensive with an average ticket price of $472.

What is the cheapest Portland to Illinois flight route?

Fly from Portland to Chicago Midway for the best Portland - Illinois flight prices

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

You are more likely to see cheaper flights to Illinois from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $348 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Portland for as low as $298 on momondo.

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

There are 4 cabin classes available to choose from on Portland 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 Portland to Illinois flights?

You could potentially save up to 29% on your flight if you consider stops on a Portland to Illinois flight.

Cheap Portland to Illinois flight deals and tips

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

Best Price Found	$216
Fastest flight time	3h 45m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Portland in the past 72 hours is $216. The best round-trip flight deal from Portland to Illinois found on momondo in the last 72 hours is $390.

The fastest flight from Portland to Illinois takes 3h 45m

Direct flights go from Portland to Illinois every day.

There are 98 airports in Illinois. From Portland there are direct flights to Chicago Midway (MDW), Lambert-St Louis (STL).

Search flight deals

Frequently asked questions about flying from Portland to Illinois

When did momondo last update prices for flights from Portland Airport to Illinois?
Prices for flights from Portland Airport to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Portland Airport to Illinois?
As of June 2026, there are 7 operators available to choose from for flights from Portland Airport to Illinois.
How old do you have to be to fly from Portland Airport to Illinois?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Portland to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Portland to Illinois is Boeing 737-800 (29.36% of total bookings). The next most popular plane models are Airbus A321-100/200 (14.93%), Boeing 737-900 (11.83%), and Airbus A321neo (10.27%).

Best airlines flying from Portland to Illinois

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

Airline	Rating	Free Cancellation	Price
Hawaiian Airlines	PriceFrom $93	Free Cancellation	Rating 7.8 2,827 reviews	Search Hawaiian Airlines flights
Frontier	PriceFrom $96	Free Cancellation	Rating 5.6 2,879 reviews	Search Frontier flights
Delta	PriceFrom $125	Free Cancellation	Rating 7.8 8,416 reviews	Search Delta flights
American Airlines	PriceFrom $172	Free Cancellation	Rating 7.1 11,700 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $207	Free Cancellation	Rating 7.9 12,538 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $217	Free Cancellation	Rating 7.9 4,239 reviews	Search Southwest flights
United Airlines	PriceFrom $218	Free Cancellation	Rating 7.4 9,861 reviews	Search United Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to Illinois. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Portland to Illinois flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Portland.

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

Yes. momondo can track prices for Portland to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Popular cities in Illinois

Flights to New Yorkfrom $82

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Flights to Miamifrom $50

Flights to Chicagofrom $55

Flights to San Franciscofrom $56

Flights to Las Vegasfrom $51

Flights to Washington, D.C.from $56

Flights to Bostonfrom $72

Flights to Atlantafrom $58

Flights to Fort Lauderdalefrom $58

Flights to Dallasfrom $86

Cheap flights from Portland to Illinois from $126

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Illinois departing on 9/13. 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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United Airlines flights from Portland to Illinois

Our best United Airlines deals on Portland to Illinois flight tickets

Delta flights from Portland to Illinois

Our best Delta deals on Portland to Illinois flight tickets

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How to get the cheapest flight ticket from Portland to Illinois

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?

What is the cheapest Portland to Illinois flight route?

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

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

Can stopping save me money on Portland to Illinois flights?

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

What airlines fly to Illinois?

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

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

Cheap Portland to Illinois flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Portland to Illinois

Best airlines flying from Portland to Illinois

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

Why use momondo?

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

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