PDX

$120 Find Cheap Flights from Illinois to Portland - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Portland departing on 9/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from Illinois to Portland

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Portland that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Illinois to Portland

Thu, Jul 30 - Tue, Aug 4
Frontier Logo
8:08 pm - 4:51 pm
STL
-
PDX
22h 43m
1 stop
Frontier Logo
5:16 pm - 7:23 pm
PDX
-
STL
24h 07m
1 stop
$275Frontier
Tue, Jul 28 - Mon, Aug 3
Frontier Logo
8:08 pm - 4:36 pm
STL
-
PDX
22h 28m
1 stop
Frontier Logo
5:49 pm - 6:05 pm
PDX
-
STL
22h 16m
1 stop
$285Frontier
Sat, Sep 12 - Sat, Sep 19
American Airlines Logo
4:57 pm - 12:07 am
MLI
-
PDX
9h 10m
1 stop
American Airlines Logo
6:00 am - 4:03 pm
PDX
-
MLI
8h 03m
1 stop
$291American Airlines
Wed, Sep 30 - Sun, Oct 4
Multiple Airlines Logo
6:08 pm - 8:20 pm
STL
-
PDX
4h 12mnonstop
Multiple Airlines Logo
3:22 pm - 7:15 pm
PDX
-
STL
25h 53m
1 stop
$294Multiple Airlines
Wed, Dec 2 - Wed, Dec 9
Delta Logo
11:00 am - 9:53 pm
MLI
-
PDX
12h 53m
2 stops
Delta Logo
9:45 pm - 10:26 am
PDX
-
MLI
10h 41m
1 stop
$296Delta
Tue, Sep 8 - Sun, Sep 13
Multiple Airlines Logo
6:08 pm - 8:20 pm
STL
-
PDX
4h 12mnonstop
Multiple Airlines Logo
9:34 pm - 11:51 am
PDX
-
STL
12h 17m
1 stop
$299Multiple Airlines
Sat, Aug 15 - Sun, Aug 16
Southwest Logo
8:30 am - 10:40 am
STL
-
PDX
4h 10mnonstop
Southwest Logo
11:30 pm - 10:30 am
PDX
-
STL
9h 00m
1 stop
$309Southwest
Sat, Jul 18 - Fri, Jul 31
American Airlines Logo
4:44 pm - 12:55 am
MLI
-
PDX
10h 11m
1 stop
American Airlines Logo
12:45 am - 10:39 am
PDX
-
MLI
7h 54m
1 stop
$320American Airlines
Tue, Aug 25 - Sat, Aug 29
Southwest Logo
8:55 pm - 11:10 pm
MDW
-
PDX
4h 15mnonstop
Southwest Logo
11:30 pm - 5:25 am
PDX
-
MDW
3h 55mnonstop
$325Southwest
Wed, Dec 2 - Wed, Dec 9
Delta Logo
11:00 am - 9:53 pm
MLI
-
PDX
12h 53m
2 stops
Delta Logo
10:15 am - 10:30 pm
PDX
-
MLI
10h 15m
2 stops
$330Delta
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$120
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from St. Louis to Portland

FAQs for booking flights from Illinois to Portland

  • How does KAYAK find such low prices on flights from Illinois to Portland?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Portland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Portland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portland from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to Portland?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Portland with an airline and back to Illinois with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Portland?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Portland from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Seaside
Vancouver
Salem
The Dalles
Stevenson
Lake Oswego
Clackamas
Government Camp
Carson
Kelso
Gleneden Beach
Gladstone
Oceanside
Dundee
Durham

Everything you need to know for your flight to Portland

Information on the airport you'll fly into in Portland

Portland (PDX)