When To Fly From Chicago To Seattle
Average Lowest Fares Found by Travel Month
HOW TO FIND THIS FARE
  • AIRLINES
    Frontier
  • ADVANCE PURCHASE REQUIRED
    7 DAYS BEFORE TRAVEL
  • DAYS AVAILABLE FOR TRAVEL
    Mon-Sat
  • TRAVEL ENDING
    Wed, November 01, 2017
Jocelyn C.
Staff Airfare Analyst
Jocelyn's Notes:
Spring/Late Summer/Fall travel. No min. stay. Fare can be bought one-way for half the lowest roundtrip price. No peak summer travel at this price.
Travel through May 22 and Tue/Wed/Sat at a slightly higher fare Aug. 15 through Nov. 1, 2017. This fare may require a long layover in Denver.

Fare found on FlyFrontier.com. Lower fares may be available for Frontier Discount Den members. Frontier charges a $30-$35 fee each way for carry-on bags larger than 18x14x8 inches and a $25-$35 fee each way for first checked bag no larger than 62 linear inches (length + width + depth) and no heavier than 50 pounds. These bag fees apply to online purchases before check-in. Higher fees apply at web check-in or at the airport.

During booking on FlyFrontier.com, you can purchase "The Works", which includes one checked bag, one standard sized carry-on bag, stretch seating, no change fees, and refundability, for much less than purchasing these items separately.
To the best of our knowledge, there is a reasonable amount of seat availability at the stated price. Flexible travel dates may be required to find this rate; seats may not be available on all flights or all dates of travel. Holiday periods may be excluded. We monitor the availability of the fare and take efforts to remove and/or modify fares when no longer available.
All mandatory taxes/fees are included in the price. Tax-inclusive fare may be a few dollars higher or lower depending on the airport you connect through, if any. Baggage fees, if applicable, and other optional fees are not included. Our Dealhounds found this airfare using flexible date search. This means we searched a range of dates to find you the best price.
More Details
Close Details
Lowest Price by Travel Month
CHICAGO (ORD) to SEATTLE (SEA) Flights
May
05/31/17 - 06/06/17
$328
United
June
06/26/17 - 07/03/17
$275
United
July
07/02/17 - 07/11/17
$275
United
August
08/09/17 - 08/14/17
$266
Delta
September
09/06/17 - 09/13/17
$316
United
October
10/17/17 - 10/24/17
$295
Frontier
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