PDX

$96 Find Cheap Flights from Illinois to Portland

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 12/17. 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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Everything you should know

Cheapest round-trip
$127
Typical prices: $232-$382
Frontier
Wed 1/7Sun 1/11
STL - PDX • 1 stop
Cheapest non-stop
$229
Alaska Airlines
Wed 5/13Mon 5/18
STL - PDX • Non-stop
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We hope you love your trip to Portland!
Flight Deals
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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

Wed, Jan 7 - Sun, Jan 11
Frontier Logo
7:43 pm - 11:15 amSTL-PDX
17h 32m1 stop
Frontier Logo
12:10 pm - 10:02 amPDX-STL
19h 52m1 stop
$127Frontier
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Wed, Jan 7 - Sun, Jan 11
Frontier Logo
7:43 pm - 12:23 pmSTL-PDX
18h 40m2 stops
Frontier Logo
12:10 pm - 10:02 amPDX-STL
19h 52m1 stop
$162Frontier
Find Deal
Wed, Jan 7 - Sun, Jan 11
Frontier Logo
7:43 pm - 12:23 pmSTL-PDX
18h 40m2 stops
Frontier Logo
12:10 pm - 10:02 amPDX-STL
19h 52m1 stop
$179Frontier
Find Deal
Wed, May 13 - Mon, May 18
Alaska Airlines Logo
6:20 pm - 8:30 pmSTL-PDX
4h 10mnonstop
Alaska Airlines Logo
11:25 am - 5:13 pmPDX-STL
3h 48mnonstop
$229Alaska Airlines
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Sat, Jan 10 - Sat, Jan 17
Southwest Logo
8:35 am - 11:15 amMDW-PDX
4h 40mnonstop
Southwest Logo
8:45 am - 6:30 pmPDX-MDW
7h 45m2 stops
$232Southwest
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Mon, Jan 26 - Thu, Jan 29
Alaska Airlines Logo
2:06 pm - 4:48 pmORD-PDX
4h 42mnonstop
Alaska Airlines Logo
7:05 am - 1:10 pmPDX-ORD
4h 05mnonstop
$234Alaska Airlines
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Tue, Jan 27 - Mon, Feb 2
Delta Logo
10:48 am - 7:13 pmMDW-PDX
10h 25m1 stop
Delta Logo
12:40 am - 9:08 amPDX-MDW
6h 28m1 stop
$237Delta
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Thu, Mar 5 - Mon, Mar 9
Multiple Airlines Logo
2:07 pm - 4:50 pmORD-PDX
4h 43mnonstop
Multiple Airlines Logo
12:55 pm - 12:12 amPDX-ORD
9h 17m1 stop
$241Multiple Airlines
Find Deal
Sat, Jan 10 - Sat, Jan 17
Southwest Logo
1:10 pm - 8:40 pmMDW-PDX
9h 30m1 stop
Southwest Logo
8:45 am - 6:30 pmPDX-MDW
7h 45m2 stops
$242Southwest
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Tue, Dec 16 - Thu, Dec 25
Delta Logo
6:30 am - 12:40 pmSTL-PDX
8h 10m1 stop
Delta Logo
2:11 pm - 10:16 pmPDX-STL
6h 05m1 stop
$243Delta
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Useful Info

Good to know

Low seasonJanuary
Cheapest flight$96
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 4% 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
Lake Oswego
Clackamas
Stevenson
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)