$166+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA ā ILG
Sep 6 ā Sep 131
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 āFind dealsā2. 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 providerās pricing and select the best option for you! Book through your favorite providerās website for a seamless experience.Cheap flight deals from Seattle to Delaware
Cheapest
Best
Last-minute
One-way
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 August 7, 2026.
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 August 7, 2026.
This CheapOair deal was found by Cheapflights users on 8/7. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure CheapOair is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 8/188:53 pm -
1 stop30h 37m
Sun 8/238:37 pm -
1 stop15h 42m
Deal found 8/7![Frontier logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 8/6. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 10/179:29 pm -
Nonstop5h 12m
Wed 10/218:44 pm -
1 stop16h 07m
Deal found 8/6![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 9/47:06 pm -
1 stop7h 33m
Mon 9/78:37 pm -
1 stop15h 42m
Deal found 8/4![Frontier logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 9/17:07 pm -
1 stop7h 32m
Fri 9/117:00 am -
Nonstop5h 51m
Deal found 8/5![Multiple Airlines logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Mon 9/79:36 pm -
1 stop29h 54m
Sun 9/274:48 pm -
1 stop8h 51m
Deal found 8/2![Multiple Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 8/5. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Southwest is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 9/115:15 am -
1 stop9h 40m
Mon 9/1412:45 pm -
2 stops11h 05m
Deal found 8/5![Southwest logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Mon 9/79:36 pm -
1 stop29h 54m
Fri 9/255:32 pm -
2 stops19h 10m
Deal found 8/2![Frontier logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 9/17:07 pm -
1 stop7h 32m
Sun 9/206:10 pm -
2 stops18h 32m
Deal found 8/2![Multiple Airlines logo]()
$336
This Super.com deal was found by Cheapflights users on 8/7. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Super.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 8/157:06 pm -
1 stop13h 43m
Wed 8/198:00 am -
1 stop29h 39m
Deal found 8/7![Frontier logo]()
$337
This CheapOair deal was found by Cheapflights users on 8/3. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure CheapOair is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 8/48:13 pm -
1 stop30h 47m
Sat 8/811:06 am -
1 stop26h 58m
Deal found 8/3![Frontier logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 9/17:07 pm -
1 stop7h 32m
Wed 9/237:00 am -
Nonstop5h 51m
Deal found 8/2![Multiple Airlines logo]()
$340
This CheapOair deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure CheapOair is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Wed 9/27:06 pm -
1 stop7h 33m
Wed 9/303:57 pm -
1 stop9h 40m
Deal found 8/4![Multiple Airlines logo]()
$341
Best flights from Seattle to DelawareDiscover carefully curated flight deals from Seattle to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 7, 2026.
Discover carefully curated flight deals from Seattle to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 7, 2026.
This Southwest deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Southwest is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Wed 9/1611:05 pm -
2 stops11h 10m
Wed 9/231:45 pm -
1 stop7h 10m
Deal found 8/4![Southwest logo]()
$352
This Alaska Airlines deal was found by Cheapflights users on 8/2. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Alaska Airlines is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Thu 9/109:27 pm -
Nonstop5h 13m
Fri 9/256:59 pm -
Nonstop5h 52m
Deal found 8/2![Alaska Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Delta is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Thu 9/39:30 pm -
Nonstop5h 20m
Fri 9/257:05 am -
Nonstop5h 51m
Deal found 8/4![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 8/6. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Southwest is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Wed 9/1611:05 pm -
2 stops11h 10m
Tue 9/222:45 pm -
2 stops11h 25m
Deal found 8/6![Southwest logo]()
$357
This Alaska Airlines deal was found by Cheapflights users on 8/6. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Alaska Airlines is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 9/199:27 pm -
Nonstop5h 13m
Wed 9/236:59 pm -
Nonstop5h 52m
Deal found 8/6![Alaska Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 8/6. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Delta is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 9/189:30 pm -
Nonstop5h 20m
Fri 9/257:05 am -
Nonstop5h 51m
Deal found 8/6![Delta logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 8/3. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Alaska Airlines is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 9/89:27 pm -
Nonstop5h 13m
Sat 9/126:59 pm -
Nonstop5h 52m
Deal found 8/3![Alaska Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Delta is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 9/59:30 pm -
Nonstop5h 20m
Fri 9/257:05 am -
Nonstop5h 51m
Deal found 8/4![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 8/6. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Southwest is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 10/612:10 am -
1 stop7h 30m
Sat 10/107:55 am -
1 stop9h 00m
Deal found 8/6![Southwest logo]()
$363
This American Airlines deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure American Airlines is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Thu 9/178:20 am -
1 stop11h 39m
Mon 9/216:41 am -
1 stop19h 16m
Deal found 8/4![American Airlines logo]()
$841
This Southwest deal was found by Cheapflights users on 8/3. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Southwest is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Thu 10/112:10 am -
1 stop7h 40m
Tue 10/65:30 am -
1 stop8h 20m
Deal found 8/3![Southwest logo]()
$363
This Alaska Airlines deal was found by Cheapflights users on 8/3. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Alaska Airlines is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 9/199:27 pm -
Nonstop5h 13m
Thu 9/244:48 pm -
1 stop8h 51m
Deal found 8/3![Alaska Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 8/6. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Delta is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 9/1911:59 pm -
1 stop7h 48m
Tue 9/225:45 am -
1 stop10h 13m
Deal found 8/6![Delta logo]()
$379
This American Airlines deal was found by Cheapflights users on 8/7. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure American Airlines is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 9/48:10 am -
1 stop11h 48m
Fri 9/116:41 am -
1 stop17h 24m
Deal found 8/7![American Airlines logo]()
$902
This American Airlines deal was found by Cheapflights users on 8/6. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure American Airlines is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Thu 9/38:10 am -
1 stop11h 48m
Thu 9/106:41 am -
1 stop17h 24m
Deal found 8/6![American Airlines logo]()
$923
This American Airlines deal was found by Cheapflights users on 8/5. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure American Airlines is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 9/47:40 am -
2 stops10h 37m
Mon 9/76:41 am -
1 stop8h 09m
Deal found 8/5![American Airlines logo]()
$938
This American Airlines deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure American Airlines is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 8/256:10 am -
2 stops11h 01m
Thu 8/279:45 am -
1 stop10h 40m
Deal found 8/4![American Airlines logo]()
$1,359
Last-minute flights from Seattle to DelawareDiscover last-minute flight deals from Seattle to Delaware. Data last updated August 7, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Delaware. Data last updated August 7, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 8/7. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Super.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 8/157:06 pm -
1 stop13h 43m
Wed 8/198:00 am -
1 stop29h 39m
Deal found 8/7![Frontier logo]()
$337
This CheapOair deal was found by Cheapflights users on 8/7. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure CheapOair is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 8/188:53 pm -
1 stop30h 37m
Sun 8/238:37 pm -
1 stop15h 42m
Deal found 8/7![Frontier logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 8/219:29 pm -
1 stop30h 01m
Thu 8/278:37 pm -
1 stop15h 42m
Deal found 8/3![Frontier logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 9/17:07 pm -
1 stop7h 32m
Fri 9/117:00 am -
Nonstop5h 51m
Deal found 8/5![Multiple Airlines logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 9/17:07 pm -
1 stop7h 32m
Sun 9/206:10 pm -
2 stops18h 32m
Deal found 8/2![Multiple Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 9/17:07 pm -
1 stop7h 32m
Wed 9/237:00 am -
Nonstop5h 51m
Deal found 8/2![Multiple Airlines logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Wed 9/27:06 pm -
1 stop7h 33m
Tue 9/227:00 am -
Nonstop5h 51m
Deal found 8/4![Multiple Airlines logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 9/47:06 pm -
1 stop7h 33m
Mon 9/78:37 pm -
1 stop15h 42m
Deal found 8/4![Frontier logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 9/57:06 pm -
1 stop7h 33m
Sun 9/2712:40 pm -
2 stops24h 02m
Deal found 8/4![Frontier logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Mon 9/79:36 pm -
1 stop29h 54m
Sun 9/274:48 pm -
1 stop8h 51m
Deal found 8/2![Multiple Airlines logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Mon 9/79:36 pm -
1 stop29h 54m
Fri 9/255:32 pm -
2 stops19h 10m
Deal found 8/2![Frontier logo]()
$335
This Southwest deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Southwest is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 9/115:15 am -
1 stop9h 40m
Mon 9/1412:45 pm -
2 stops11h 05m
Deal found 8/4![Southwest logo]()
$334
One-way flights from Seattle to DelawareSearch for one-way flight options from Seattle to Delaware. Find affordable one-way fares based on user searches. Data last updated August 7, 2026.
Search for one-way flight options from Seattle to Delaware. Find affordable one-way fares based on user searches. Data last updated August 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 10/34:27 pm -
2 stops53h 03m
Deal found 8/7![Frontier logo]()
$166
This Super.com deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Super.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sun 8/309:29 pm -
1 stop30h 01m
Deal found 8/4![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 9/294:27 pm -
2 stops37h 14m
Deal found 8/2![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 11/37:41 pm -
2 stops24h 30m
Deal found 8/3![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 8/287:06 pm -
2 stops22h 22m
Deal found 8/4![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 9/17:07 pm -
2 stops27h 09m
Deal found 8/5![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Tue 8/257:06 pm -
2 stops24h 27m
Deal found 8/5![Frontier logo]()
$173
This United Airlines deal was found by Cheapflights users on 8/5. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure United Airlines is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 10/177:11 am -
1 stop11h 04m
Deal found 8/5![United Airlines logo]()
$174
This CheapOair deal was found by Cheapflights users on 8/5. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure CheapOair is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Thu 9/39:29 pm -
1 stop30h 01m
Deal found 8/5![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 10/24:27 pm -
2 stops35h 49m
Deal found 8/3![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the āPick Datesā button in this card will allow you to select your dates and further customize your flight criteria. From there, click āFind dealsā, make sure Kiwi.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Thu 9/104:27 pm -
2 stops39h 35m
Deal found 8/3![Frontier logo]()
$177
Find flight deals from Seattle to Delaware
Keep the following information in mind while searching for Seattle to Delaware flight deals. Data was last updated August 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $329 (CheapOair) |
One-way from | $166 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $467 |
Cheapflights Fare Finder
Ā
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 August 7, 2026.
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
Cheapest round-trip
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Wed 9/16
11:05 pm-1:15 pm
2 stops11h 10m
Philadelphia
Wed 9/23
1:45 pm-5:55 pm
1 stop7h 10m
$352
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Wed 9/16
11:05 pm-1:15 pm
2 stops11h 10m
Philadelphia
Tue 9/22
2:45 pm-11:10 pm
2 stops11h 25m
$357
Quickest round-trip
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Thu 9/10
9:27 pm-5:40 am
Nonstop5h 13m
Philadelphia
Fri 9/25
6:59 pm-9:51 pm
Nonstop5h 52m
$359
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Thu 9/3
9:30 pm-5:50 am
Nonstop5h 20m
Philadelphia
Fri 9/25
7:05 am-9:56 am
Nonstop5h 51m
$359
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Sat 9/19
9:27 pm-5:40 am
Nonstop5h 13m
Philadelphia
Wed 9/23
6:59 pm-9:51 pm
Nonstop5h 52m
$359
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Fri 9/18
9:30 pm-5:50 am
Nonstop5h 20m
Philadelphia
Fri 9/25
7:05 am-9:56 am
Nonstop5h 51m
$359
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Tue 9/8
9:27 pm-5:40 am
Nonstop5h 13m
Philadelphia
Sat 9/12
6:59 pm-9:51 pm
Nonstop5h 52m
$359
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Sat 9/5
9:30 pm-5:50 am
Nonstop5h 20m
Philadelphia
Fri 9/25
7:05 am-9:56 am
Nonstop5h 51m
$359
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Tue 10/6
12:10 am-10:40 am
1 stop7h 30m
Philadelphia
Sat 10/10
7:55 am-1:55 pm
1 stop9h 00m
$363
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Thu 10/1
12:10 am-10:50 am
1 stop7h 40m
Philadelphia
Tue 10/6
5:30 am-10:50 am
1 stop8h 20m
$363
Showing 1-10 of 28 resultsSorted by cheapest first
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.
SEA-PHL
SEA-SBY
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Delaware
SEA-USDE
SEA-PHL
SEA-SBY
No data available for this route at this time. Please check back soon.
Related info for your journey
Find useful and relevant information for your journey from Seattle to Delaware. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations