Title:  Cheap Flights from Wilmington (ILG) to Seattle (SEA) - Expedia.ca

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#  Cheap Flights from Wilmington (ILG) to Seattle (SEA)

- [Roundtrip](?flightType=roundtrip)
- [One-way](?flightType=oneway)
- [Multi-city](?flightType=multicity)

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## Popular airlines from Wilmington, DE (ILG-New Castle) to Seattle-Tacoma International Airport (SEA)

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American Airlines  
[](https://www.expedia.ca/Flights-Search?leg1=from:ILG,to:SEA,departure:05/02/2026TANYT&leg2=from:SEA,to:ILG,departure:12/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}])

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__Flight from Wilmington to Seattle (ILG - SEA) route information__
| Origin airport      | New Castle             |
| ------------------- | ---------------------- |
| Destination airport | Seattle - Tacoma Intl. |
| Distance            | 3778 km                |

## New Castle to Seattle Flights

**The easy way to book your flights from Wilmington to Seattle** 

With Expedia, it’s simple to find and book flights to Seattle from Wilmington whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from airlines that cover this route. There are nonstop flights to Seattle - Tacoma Intl., too. 

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Wilmington to Seattle today, tomorrow, or this week. 

**Save dollars with cheap flights from New Castle, ILG to Seattle - Tacoma Intl., SEA** 

Sort your search results by price to find great deals on your flight from Wilmington to Seattle—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Seattle from Wilmington currently is just rising to . 

Here are more money-saving tips: 

- Fly in when flight prices are normally at their lowest
- Book about a month to 6 weeks before you travel for the best prices to Seattle
- Avoid peak season and weekends when flights can cost more
- Early morning and late-night flights are sometimes cheaper, so try varying your travel times
- One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free!

**Reasons to choose Expedia for your flight to Seattle from Wilmington** 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Seattle with Expedia today.

## Frequently asked questions

### How much is a flight from ILG to Seattle - Tacoma Intl. Airport (SEA)?

### Do I need to pay a cancellation fee if I cancel my flight from ILG to Sea-Tac Airport?

### How do I find cheap flights from ILG to Seattle - Tacoma Intl. Airport (SEA) that have flexible change policies?

### How far is the flight from ILG to Sea-Tac Airport?

### Which airlines fly direct from ILG to SEA?

### Are ILG to SEA flight tickets cheaper when they're purchased at the last minute?

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