Flights from Chicago to Seattle from $216

Compare All CHI to SEA Flights

Prices are per person for one-way travel. Click “Book” to complete your reservation on the partner site.

2 of 2 flights

Airline	Schedule	Stops	Duration	Price
WN WN · 2701	18:40 CHI 15:10 SEA	0 stop(s)	20h 30m	$216 Best	Book →
F9 F9 · 2445	Schedule on partner site	1 stop(s)	—	$263	Book →

Airport Information

Key details about departure and arrival airports for this route

SEA

Seattle–Tacoma International Airport

City: Seattle
Country: US
Type: Large Airport
Elevation: 433 ft

SEA Airport Guide →

Tips for Chicago to Seattle Flights

Save money and travel smarter with these route-specific tips

📅 When to Book

Book CHI–SEA flights 6–8 weeks in advance for the best prices. Last-minute fares are typically 40–60% more expensive on this route.

💰 Price Trends

The average fare is $240, but prices as low as $216 are available. That’s a potential saving of 18% compared to the most expensive option.

✈ Direct vs Connecting

No direct flights currently listed. Consider flexible dates or nearby airports for better connections.

📍 Flexible Dates

Flying midweek (Tuesday–Thursday) on CHI–SEA is typically 15–30% cheaper. Use our price comparison to spot the best day to fly.

Frequently Asked Questions

Everything you need to know about flying CHI to SEA

What is the cheapest flight from Chicago to Seattle?

The cheapest flight from Chicago (CHI) to Seattle (SEA) currently starts at $216 with WN. Prices are updated regularly and may vary by date and availability.

How many airlines fly from CHI to SEA?

We found 2 airline(s) operating on the CHI–SEA route, including WN, F9.

Are there direct flights from Chicago to Seattle?

No direct flights are currently listed on this route. All available options involve at least one stop. Consider flexible dates or nearby airports for better connection options.

What is the average flight price on this route?

The average flight price from Chicago to Seattle is approximately $240. Prices range from $216 to $263 depending on airline, time, and class.

How long is the flight from CHI to SEA?

The average flight duration from Chicago to Seattle is approximately 20 hours 30 minutes. Direct flights are typically shorter than connecting options.

What is the baggage allowance on CHI–SEA flights?

Baggage allowance varies by airline and fare class. Most economy fares on this route include 1 carry-on (7–8 kg) and 1 checked bag (20–23 kg). Always confirm baggage rules on the airline's site at booking — low-cost carriers may charge for checked bags.