Flights from ICN to Seattle, WA
Compare prices from 900+ airlines and find the best deals on flights from ICN to SEA.*Prices shown are estimated based on historical data.
ICN to Seattle, WA
Round-trip flights from ICN to SEA typically cost $700-$875 USD. Prices vary by season, demand, and how far in advance you book. The lowest fares are usually found 6-8 weeks before departure for domestic routes.
Non-stop flights from ICN to SEA take approximately 12h 15m. Actual flight times vary based on weather, air traffic, and aircraft type. Consider arriving at the airport 2 hours before domestic departures.
Airlines operating ICN to SEA include Copa Airlines, Alaska Airlines, Air France, Japan Airlines. Each airline offers different fare classes, baggage policies, and loyalty programs. Compare options to find the best value for your travel needs.
The cheapest day to fly ICN to SEA is typically Tuesday. Mid-week flights are 10-20% cheaper than weekend departures. For best prices, book 6-8 weeks before your trip. Avoid booking less than 2 weeks out when fares spike.
Fares range from $700 to $1313 depending on dates, class, and airline.
Prices based on 500 searches. Updated hourly.
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About Flights from ICN to Seattle, WA
Looking for cheap flights from ICN (ICN) to Seattle, WA (SEA)? You've come to the right place. Fly2Any compares prices from over 900 airlines to help you find the best deals on this popular route.
Flight Information
Flights from ICN to SEA typically take around 12h 15m. The flight covers a distance of 6155 miles. Multiple airlines operate this route, including Copa Airlines, Alaska Airlines, Air France, Japan Airlines.
Best Time to Book
For the best prices on ICN to SEA flights, we recommend booking 2-3 months in advance. Prices tend to be lowest for mid-week departures (Tuesday and Wednesday). Use our Price Calendar feature to compare prices across different dates and find the cheapest options.
Price data last updated: April 2026
Airlines on This Route
Several major airlines serve the ICN to Seattle, WA route, including:
- Copa Airlines (CM)
- Alaska Airlines (AS)
- Air France (AF)
- Japan Airlines (JL)
Frequently Asked Questions - ICN to SEA Flights
How long is the flight from ICN to Seattle, WA?
Direct flights from ICN (ICN) to Seattle, WA (SEA) take approximately 12h 15m. Connecting flights may add 2-4 hours depending on layover location. For the fastest journey, look for nonstop flights which are typically available on this popular route.
When is the best time to book ICN to SEA flights?
For the best prices on ICN to SEA flights, book 6-8 weeks in advance for domestic routes or 2-4 months ahead for international travel. Domestic flights are typically 20-40% cheaper in off-peak months. Peak season months (July, August) have higher prices, while January and February typically offer the best deals.
What are the cheapest days to fly from ICN to Seattle, WA?
Tuesday and Wednesday departures are typically 15-25% cheaper than weekend flights on the ICN to SEA route. Saturday is usually the most expensive day to fly. For additional savings, consider red-eye flights or early morning departures, which often have lower fares and less crowded airports.
Which airlines fly from ICN to SEA?
Multiple airlines serve the ICN to SEA route. Compare prices across all carriers using Fly2Any to find the best combination of price, timing, and amenities.
What is the cheapest month to fly from ICN to Seattle, WA?
The cheapest months to fly from ICN to SEA are typically January, February, September. Domestic flights are typically 20-40% cheaper in off-peak months. Avoid peak travel periods like July and August when prices can be 30-50% higher. Use Fly2Any's price alerts to get notified when fares drop.
What is the baggage allowance for ICN to SEA flights?
Baggage allowances vary by airline and fare class. Most full-service carriers include one checked bag (up to 50 lbs) on this route. Budget carriers may charge $25-$60 for checked bags. All airlines allow one personal item free. Compare total costs including baggage fees when booking to get the best deal.
Are there direct flights from ICN to Seattle, WA?
Yes, several airlines offer nonstop flights from ICN to SEA. Direct flights take approximately 12h 15m. If you're flexible with your schedule, connecting flights through major hubs like ATL or ORD may offer lower prices.
How much do flights from ICN to Seattle, WA cost?
Prices for ICN to SEA flights typically range from $150-$500 roundtrip for economy class, depending on when you book and travel dates. Use Fly2Any to compare all airlines and find current deals. Setting a price alert ensures you never miss a fare drop.
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