$165+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA ā ILG
Sep 17 ā Sep 241
Round-trip
1 adult, Economy
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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
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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 18, 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 18, 2026.
This CheapOair deal was found by Cheapflights users on 8/18. 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 8/198:53 pm -
1 stop30h 37m
Sun 8/238:37 pm -
1 stop15h 42m
Deal found 8/18![Frontier logo]()
$329
This CheapOair deal was found by Cheapflights users on 8/18. 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 10/84:27 pm -
1 stop29h 49m
Mon 10/125:50 am -
1 stop12h 22m
Deal found 8/18![Frontier logo]()
$330
This CheapOair deal was found by Cheapflights users on 8/14. 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 10/229:16 pm -
1 stop31h 02m
Sun 10/255:50 am -
1 stop12h 22m
Deal found 8/14![Frontier logo]()
$331
This Expedia deal was found by Cheapflights users on 8/16. 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 Expedia is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Wed 9/27:06 pm -
1 stop7h 33m
Sun 9/67:00 am -
1 stop11h 28m
Deal found 8/16![Frontier logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 8/197:06 pm -
1 stop7h 33m
Thu 9/245:32 pm -
2 stops19h 10m
Deal found 8/18![Frontier logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 10/148:00 pm -
2 stops24h 43m
Sat 10/245:50 am -
1 stop12h 22m
Deal found 8/16![Frontier logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 10/148:00 pm -
2 stops24h 43m
Fri 10/235:50 am -
1 stop12h 22m
Deal found 8/16![Frontier logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 9/810:15 pm -
2 stops19h 53m
Deal found 8/15![Frontier logo]()
$338
This CheapOair deal was found by Cheapflights users on 8/16. 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 9/22:37 pm -
1 stop12h 02m
Mon 9/78:00 am -
1 stop29h 39m
Deal found 8/16![Frontier logo]()
$339
This Booking.com deal was found by Cheapflights users on 8/14. 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 Booking.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 8/217:06 pm -
1 stop7h 33m
Sat 8/228:00 am -
1 stop29h 39m
Deal found 8/14![Frontier logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 8/187:06 pm -
1 stop7h 33m
Sun 8/238:37 pm -
1 stop15h 42m
Deal found 8/14![Frontier logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 8/297:06 pm -
1 stop7h 33m
Thu 9/37:00 am -
1 stop11h 28m
Deal found 8/16![Frontier logo]()
$342
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 18, 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 18, 2026.
This Delta deal was found by Cheapflights users on 8/13. 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.
Mon 11/99:38 pm -
Nonstop5h 07m
Sat 11/147:00 am -
Nonstop6h 12m
Deal found 8/13![Delta logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 8/16. 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 11/38:32 am -
Nonstop5h 13m
Sat 11/77:02 am -
Nonstop6h 06m
Deal found 8/16![Alaska Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Wed 11/48:30 am -
1 stop8h 01m
Wed 11/111:16 pm -
1 stop8h 47m
Deal found 8/17![United Airlines logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 8/15. 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 10/229:29 pm -
Nonstop5h 12m
Sun 10/257:02 am -
Nonstop5h 53m
Deal found 8/15![Alaska Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 8/14. 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 10/229:29 pm -
Nonstop5h 08m
Sun 10/257:00 am -
Nonstop5h 58m
Deal found 8/14![Delta logo]()
$359
This Delta deal was found by Cheapflights users on 8/14. 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 10/159:29 pm -
Nonstop5h 08m
Tue 10/207:00 am -
Nonstop5h 58m
Deal found 8/14![Delta logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 8/15. 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.
Mon 9/286:51 pm -
1 stop17h 54m
Wed 9/304:48 pm -
1 stop8h 51m
Deal found 8/15![Alaska Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 8/13. 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
Mon 10/55:18 pm -
1 stop9h 40m
Deal found 8/13![Delta logo]()
$369
This Delta deal was found by Cheapflights users on 8/16. 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.
Tue 11/37:15 am -
1 stop7h 24m
Tue 11/107:00 am -
Nonstop6h 12m
Deal found 8/16![Delta logo]()
$369
This American Airlines deal was found by Cheapflights users on 8/16. 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 12/2211:48 pm -
2 stops19h 55m
Wed 12/306:28 am -
2 stops18h 10m
Deal found 8/16![American Airlines logo]()
$1,076
This Delta deal was found by Cheapflights users on 8/13. 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 9/126:00 am -
1 stop7h 30m
Fri 9/187:05 am -
Nonstop5h 51m
Deal found 8/13![Delta logo]()
$369
This Delta deal was found by Cheapflights users on 8/13. 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 10/212:00 pm -
1 stop8h 56m
Mon 10/57:05 am -
Nonstop5h 51m
Deal found 8/13![Delta logo]()
$369
This American Airlines deal was found by Cheapflights users on 8/16. 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 11/209:15 am -
2 stops22h 43m
Fri 11/276:30 am -
2 stops16h 38m
Deal found 8/16![American Airlines logo]()
$1,089
This American Airlines deal was found by Cheapflights users on 8/17. 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.
Mon 9/148:24 am -
1 stop9h 38m
Mon 9/216:41 am -
1 stop7h 59m
Deal found 8/17![American Airlines logo]()
$1,138
This American Airlines deal was found by Cheapflights users on 8/16. 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.
Sat 12/1911:48 pm -
2 stops19h 55m
Wed 12/306:28 am -
2 stops18h 10m
Deal found 8/16![American Airlines logo]()
$1,186
This American Airlines deal was found by Cheapflights users on 8/16. 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.
Sat 12/1911:48 pm -
2 stops19h 55m
Tue 12/296:28 am -
2 stops20h 30m
Deal found 8/16![American Airlines logo]()
$1,221
This American Airlines deal was found by Cheapflights users on 8/16. 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.
Sun 11/225:40 am -
1 stop7h 31m
Sat 11/284:39 pm -
1 stop9h 40m
Deal found 8/16![American Airlines logo]()
$1,277
This American Airlines deal was found by Cheapflights users on 8/15. 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.
Sun 8/305:15 am -
1 stop8h 00m
Thu 9/39:45 am -
2 stops12h 02m
Deal found 8/15![American Airlines logo]()
$1,434
This American Airlines deal was found by Cheapflights users on 8/16. 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.
Sat 12/196:00 am -
2 stops11h 06m
Mon 12/287:30 am -
2 stops18h 01m
Deal found 8/16![American Airlines logo]()
$1,495
Last-minute flights from Seattle to DelawareDiscover last-minute flight deals from Seattle to Delaware. Data last updated August 18, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Delaware. Data last updated August 18, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 8/187:06 pm -
1 stop7h 33m
Sun 8/238:37 pm -
1 stop15h 42m
Deal found 8/14![Frontier logo]()
$341
This CheapOair deal was found by Cheapflights users on 8/18. 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 8/198:53 pm -
1 stop30h 37m
Sun 8/238:37 pm -
1 stop15h 42m
Deal found 8/18![Frontier logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 8/197:06 pm -
1 stop7h 33m
Thu 9/245:32 pm -
2 stops19h 10m
Deal found 8/18![Frontier logo]()
$333
This Booking.com deal was found by Cheapflights users on 8/14. 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 Booking.com is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Fri 8/217:06 pm -
1 stop7h 33m
Sat 8/228:00 am -
1 stop29h 39m
Deal found 8/14![Frontier logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 8/268:53 pm -
1 stop30h 37m
Thu 9/37:00 am -
1 stop11h 28m
Deal found 8/16![Frontier logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 8/277:06 pm -
1 stop7h 33m
Wed 9/28:00 am -
1 stop29h 39m
Deal found 8/16![Frontier logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 8/297:06 pm -
1 stop7h 33m
Sat 9/58:00 am -
1 stop29h 39m
Deal found 8/16![Frontier logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 8/297:06 pm -
1 stop7h 33m
Thu 9/37:00 am -
1 stop11h 28m
Deal found 8/16![Frontier logo]()
$342
This Expedia deal was found by Cheapflights users on 8/16. 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 Expedia is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Wed 9/27:06 pm -
1 stop7h 33m
Sun 9/67:00 am -
1 stop11h 28m
Deal found 8/16![Frontier logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 9/810:15 pm -
2 stops19h 53m
Deal found 8/15![Frontier logo]()
$338
This CheapOair deal was found by Cheapflights users on 8/17. 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 9/22:37 pm -
1 stop12h 02m
Mon 9/78:00 am -
1 stop29h 39m
Deal found 8/17![Frontier logo]()
$339
This Southwest deal was found by Cheapflights users on 8/13. 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 9/1811:05 pm -
1 stop9h 10m
Mon 9/216:05 pm -
1 stop8h 50m
Deal found 8/13![Southwest logo]()
$345
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 18, 2026.
Search for one-way flight options from Seattle to Delaware. Find affordable one-way fares based on user searches. Data last updated August 18, 2026.
This Frontier deal was found by Cheapflights users on 8/15. 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 Frontier is selected, and click āCompare selectedā under the list of providers to see comparable flight deals.
Sat 8/297:06 pm -
1 stop7h 33m
Deal found 8/15![Frontier logo]()
$165
This Super.com deal was found by Cheapflights users on 8/13. 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 10/184:27 pm -
1 stop29h 49m
Deal found 8/13![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 10/148:00 pm -
2 stops26h 16m
Deal found 8/13![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/88:48 pm -
2 stops23h 30m
Deal found 8/17![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/148:15 pm -
2 stops18h 59m
Deal found 8/16![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/119:45 pm -
2 stops22h 33m
Deal found 8/13![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 10/138:00 pm -
2 stops19h 15m
Deal found 8/16![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/1510:57 am -
2 stops19h 33m
Deal found 8/16![Frontier logo]()
$173
This CheapOair deal was found by Cheapflights users on 8/14. 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 10/224:27 pm -
1 stop29h 49m
Deal found 8/14![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 11/167:41 pm -
2 stops19h 34m
Deal found 8/16![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/158:00 pm -
2 stops32h 21m
Deal found 8/14![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/128:15 pm -
2 stops32h 01m
Deal found 8/16![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 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $331 (CheapOair) |
One-way from | $165 (Frontier) |
Popular in | December |
Cheapest in | January |
Average price | $457 |
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 18, 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
Mon 11/9
9:38 pm-5:45 am
Nonstop5h 07m
Philadelphia
Sat 11/14
7:00 am-10:12 am
Nonstop6h 12m
$359
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Tue 11/3
8:32 am-4:45 pm
Nonstop5h 13m
Philadelphia
Sat 11/7
7:02 am-10:08 am
Nonstop6h 06m
$359
Quickest round-trip
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Thu 10/22
9:29 pm-5:41 am
Nonstop5h 12m
Philadelphia
Sun 10/25
7:02 am-9:55 am
Nonstop5h 53m
$359
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Thu 10/22
9:29 pm-5:37 am
Nonstop5h 08m
Philadelphia
Sun 10/25
7:00 am-9:58 am
Nonstop5h 58m
$359
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Thu 10/15
9:29 pm-5:37 am
Nonstop5h 08m
Philadelphia
Tue 10/20
7:00 am-9:58 am
Nonstop5h 58m
$359
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Fri 9/18
9:30 pm-5:50 am
Nonstop5h 20m
Philadelphia
Mon 10/5
5:18 pm-11:58 pm
1 stop9h 40m
$369
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Tue 11/3
7:15 am-5:39 pm
1 stop7h 24m
Philadelphia
Tue 11/10
7:00 am-10:12 am
Nonstop6h 12m
$369
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Sat 9/12
6:00 am-4:30 pm
1 stop7h 30m
Philadelphia
Fri 9/18
7:05 am-9:56 am
Nonstop5h 51m
$369
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Fri 10/2
12:00 pm-11:56 pm
1 stop8h 56m
Philadelphia
Mon 10/5
7:05 am-9:56 am
Nonstop5h 51m
$369
SeattlePhiladelphia
SEAĀ Seattle/Tacoma Intl - PHLĀ Philadelphia
SEAPHL
Seattle/Tacoma Intl
Wed 11/4
8:30 am-7:31 pm
1 stop8h 01m
Philadelphia
Wed 11/11
1:16 pm-7:03 pm
1 stop8h 47m
$377
Showing 1-10 of 33 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.
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