$107+ Cheap flights from Seattle (SEA) to Delaware
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Seattle to Delaware with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Delaware
Keep the following information in mind while searching for Seattle to Delaware flight deals. Data was last updated April 17, 2025.
Most accurate provider | Mytrip 3 stars |
|---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $210 (Cheapflightsfares) |
One-way from | $107 (Cheapflightsfares) |
Popular in | December |
Cheapest in | March |
Average price | $422 |
Find flight deals from Seattle to Delaware
Cheapest flights from Seattle to DelawareExplore the most affordable flight options available from Seattle to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.
Explore the most affordable flight options available from Seattle to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.
This Orbitz deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Booking.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Alaska Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Hawaiian Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Delaware that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 17, 2025.
Use the filters below to find and compare flights from Seattle to Delaware that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Fri 5/9
9:29 pm-5:44 am
Nonstop5h 15m
Philadelphia
Sun 5/11
12:20 pm-12:44 am
1 stop15h 24m
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Sun 4/27
6:00 am-9:30 pm
1 stop12h 30m
Philadelphia
Sun 5/4
12:20 pm-12:44 am
1 stop15h 24m
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Wed 4/30
12:30 pm-5:06 am
2 stops13h 36m
Philadelphia
Tue 5/6
10:08 pm-12:10 am
1 stop29h 02m
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Wed 6/4
6:00 am-5:10 pm
1 stop8h 10m
Philadelphia
Wed 6/11
6:45 pm-12:04 am
1 stop8h 19m
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Fri 8/29
7:05 pm-5:35 am
1 stop7h 30m
Philadelphia
Sat 8/30
4:12 pm-10:36 pm
1 stop9h 24m
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Wed 7/9
10:43 pm-6:50 am
Nonstop5h 07m
Philadelphia
Sat 7/19
5:33 pm-10:55 pm
1 stop8h 22m
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Sat 6/14
10:55 pm-9:25 am
1 stop7h 30m
Philadelphia
Wed 6/18
4:45 pm-12:30 am
2 stops10h 45m
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Tue 6/17
9:15 pm-5:25 am
Nonstop5h 10m
Philadelphia
Thu 8/28
6:58 pm-10:00 pm
Nonstop6h 02m
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Wed 6/18
9:15 pm-5:25 am
Nonstop5h 10m
Philadelphia
Wed 8/27
6:58 pm-10:00 pm
Nonstop6h 02m
SeattleSalisbury
SEA - SBY
SEASBY
Seattle/Tacoma Intl
Sat 5/31
9:10 am-10:02 pm
1 stop9h 52m
Salisbury-Ocean City
Sat 6/7
5:29 pm-10:55 pm
1 stop8h 26m
Best time to book a flight from Seattle to Delaware
Have a flexible travel schedule? Discover the best time to fly to Delaware from Seattle with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Delaware
Rainfall in Delaware by month
Plan your trip to Delaware by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Delaware ranges from 2.9 - 4.3 inches per month. July is typically the wettest month, when rainfall can reach 4.3 in. February is typically the driest time to visit Delaware when rainfall is around 2.9 in.
Temperature in Delaware by month
Plan your trip to Delaware by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Delaware, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).
Reviews of airlines servicing Delaware
Get insights into the airlines that provide service to Delaware. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Delaware. Reviews last updated April 17, 2025.
Read through reviews of airlines operating flights from Seattle to Delaware, such as Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Overall
Boarding
Entertainment
Comfort
Crew
Reviews
Anonymous,Aug 2024
SEA - LAS
Food
Overall
Boarding
Entertainment
Comfort
Crew
Reviews
Anonymous,Aug 2024
SEA - LAS
Food
Overall
Boarding
Entertainment
Comfort
Crew
Reviews
Anonymous,Aug 2024
SEA - LAS
Food
Overall
Boarding
Entertainment
Comfort
Crew
Reviews
Anonymous,Aug 2024
SEA - LAS
Food
Overall
Boarding
Entertainment
Comfort
Crew
Reviews
Anonymous,Aug 2024
SEA - LAS
Food
Overall
Boarding
Entertainment
Comfort
Crew
Reviews
Anonymous,Aug 2024
SEA - LAS