Cheap Flights from Seattle to Philadelphia
Browse current best options from Seattle. Become a member to unlock all deals and get alerts when new deals appear.
Deals from
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RatePunk searches hundreds of travel sites at once for deals on flights to Philadelphia
Prices updated 24 days ago
486,190 searches this week
171 airlines compared
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Fares are subject to change and may not be available for all dates. (Data last updated May 29, 2026.)
Today’s best flight deals from Seattle to Philadelphia
Explore current cheapest deals departing from Seattle to Philadelphia
Round trip
Sort by: Cheapest
September 9 - September 15
SEA - Philadelphia
$294
$231
Round trip
August 12 - August 18
SEA - Philadelphia
$301
$236
Round trip
July 17 - July 26
SEA - Philadelphia
$279
$240
Round trip
August 20 - August 23
SEA - Philadelphia
$318
$240
Round trip
August 7 - August 9
SEA - Philadelphia
$324
$240
Round trip
August 7 - August 11
SEA - Philadelphia
$321
$240
Round trip
August 20 - August 24
SEA - Philadelphia
$318
$240
Round trip
August 21 - August 24
SEA - Philadelphia
$318
$240
Round trip
August 21 - August 25
SEA - Philadelphia
$318
$240
Round trip
August 14 - August 16
SEA - Philadelphia
$319
$240
Round trip
Unlock all 500+ flight deals to Philadelphia and get alerts when great deals appear
Route Intelligence — 486,190 Searches this Week
Insights for flights from Seattle to Philadelphia
How much is a round trip from Seattle to Philadelphia
Regular price: $248 - $361
Prices for flights from Seattle to Philadelphia are currently below the regular range.
The regular price range for this route is between $248 and $361. The current lowest deal is $231 with Southwest Airlines, for travel from Sep 9-Sep 15.
now $231
Low $248
High $361
The cheapest time to fly from Seattle to Philadelphia
The cheapest month to fly from Seattle to Philadelphia is May, with a median price of $323. The most expensive month is June, with a median price of $807. Prices are generally lower from January to November.
May
Flights from $323
June
Flights from $807
Direct flights from Seattle to Philadelphia
Alaska Airlines, Inc.
Last-minute flights going from Seattle to Philadelphia
Wed, Jun 17
SEA - Philadelphia
Seattle (SEA) - Philadelphia (PHL)
American Airlines
$391
$396
One-way
Wed, Jun 17
SEA - Philadelphia
Seattle (SEA) - Philadelphia (PHL)
American Airlines
$458
$396
One-way
Thu, Jun 18
SEA - Philadelphia
Seattle (SEA) - Philadelphia (PHL)
Frontier Airlines
$463
$355
One-way
Thu, Jun 18
SEA - Philadelphia
Seattle (SEA) - Philadelphia (PHL)
Frontier Airlines
$458
$387
One-way
Fri, Jun 19
SEA - Philadelphia
Seattle (SEA) - Philadelphia (PHL)
Frontier Airlines
$458
$350
One-way
Sat, Jun 20
SEA - Philadelphia
Seattle (SEA) - Philadelphia (PHL)
Frontier Airlines
$458
$308
One-way
Biggest price drops on these dates for flights from Seattle to Philadelphia
Dec 3 - Dec 7
$550 → $308
44%
Dec 9 - Dec 13
$553 → $313
43%
Dec 4 - Dec 7
$550 → $329
40%
Dec 8 - Dec 15
$545 → $329
40%
Popular Airports to fly from Seattle to Philadelphia
Seattle - Philadelphia route insights
💸 Price insights
Recent fares are below the typical level
Recent fares from Seattle to Philadelphia are below the typical level at $231.
📅 Best time to fly
Fly in May for the cheapest deals
Historically, May offers the lowest median price at $323 for Seattle to Philadelphia.
⏱️ Flight duration
Expect 18h 24m on average
Flights from Seattle to Philadelphia typically take 18h 24m, including layovers.
✈️ Airlines & availability
Connecting flights are dominant
About 20% of deals are direct; connecting flights typically have 2 stopovers.
🏆 Airline highlight
Alaska Airlines, Inc. offers direct flights
Alaska Airlines, Inc. provides direct flight options from Seattle to Philadelphia.
🎯 Booking tip
Deals are frequent for this route
Historically, deals for Seattle to Philadelphia appear frequently, with over 1 per day.
Seattle main airports to depart from
Seattle–Tacoma International (SEA)
Fly from Seattle–Tacoma International for a convenient and affordable option to Philadelphia.
📍 ~18 km from Seattle city center (reachable by car or train)
💸 Flights from ~$231
Boeing Field (BFI)
Consider Boeing Field for flights to Philadelphia, located within Seattle.
📍 ~8 km from Seattle city center (reachable by car)
💸 Flights from ~$715
Kenmore Air Harbor Seaplane Base (LKE)
Kenmore Air Harbor Seaplane Base offers an alternative departure point from Seattle to Philadelphia.
📍 ~3 km from Seattle city center (reachable by car)
💸 Flights from ~$1453
Philadelphia main airports to arrive at
Philadelphia International (PHL)
Philadelphia International Airport is a convenient arrival choice for flights from Seattle to Philadelphia.
📍 ~10 km from city center (reachable by car)
💸 Flights from ~$231
Airports nearby Philadelphia used as alternative
Newark Liberty International (EWR)
Newark Liberty International offers significantly more flight options and excellent international routes.
📍 ~135 km from Philadelphia (reachable by train)
💸 Flights from ~$177
Baltimore–Washington International (BWI)
Baltimore–Washington International is a major Southwest Airlines base with extensive domestic coverage.
📍 ~150 km from Philadelphia (reachable by train)
💸 Flights from ~$226
Trenton–Mercer (TTN)
Trenton–Mercer provides a very fast check-in and security process for budget-friendly options.
📍 ~50 km from Philadelphia (reachable by car)
💸 Flights from ~$410
Lehigh Valley International (ABE)
Lehigh Valley International is less crowded and offers reliable regional connections.
📍 ~85 km from Philadelphia (reachable by car)
💸 Flights from ~$301
Atlantic City International (ACY)
Atlantic City International is convenient for specific low-cost leisure routes and easy to navigate.
📍 ~90 km from Philadelphia (reachable by car)
💸 Flights from ~$423
Business & First Class Flight Deals to Philadelphia
Discover luxury on the budget with premium cabin class on flights from Seattle to Philadelphia.
Elite
Best Elite deals to Philadelphia
Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.
From SEA
Elite
Nov 07
Philadelphia, United States
92% AI deal score
$2,077
$1,093
Save $984
From SEA
Elite
Dec 04
Philadelphia, United States
91% AI deal score
$1,826
$1,099
Save $727
From SEA
Elite
Nov 18
Philadelphia, United States
91% AI deal score
$1,963
$1,159
Save $804
From SEA
Elite
Nov 16
Philadelphia, United States
91% AI deal score
$1,948
$1,159
Save $789
From SEA
Elite
Nov 14
Philadelphia, United States
91% AI deal score
$1,948
$1,159
Save $789
From SEA
Elite
Nov 14
Philadelphia, United States
91% AI deal score
$1,911
$1,159
Save $752
From SEA
Elite
Nov 11
Philadelphia, United States
91% AI deal score
$1,900
$1,159
Save $741
From SEA
Elite
Sep 20
Philadelphia, United States
91% AI deal score
$1,729
$952
Save $777
From SEA
Elite
Aug 26
Philadelphia, United States
91% AI deal score
$1,701
$965
Save $736
From SEA
Elite
Sep 01
Philadelphia, United States
90% AI deal score
$2,008
$1,163
Save $845
From SEA
Elite
Sep 01
Philadelphia, United States
90% AI deal score
$1,994
$1,163
Save $831
From SEA
Elite
Oct 10
Philadelphia, United States
90% AI deal score
$1,678
$1,083
Save $595
From SEA
Elite
Dec 01
Philadelphia, United States
90% AI deal score
$1,747
$1,157
Save $590
From SEA
Elite
Nov 15
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 18
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 15
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 11
Philadelphia, United States
90% AI deal score
$1,869
$1,159
Save $710
From SEA
Elite
Nov 14
Philadelphia, United States
90% AI deal score
$1,826
$1,159
Save $667
From SEA
Elite
Nov 10
Philadelphia, United States
90% AI deal score
$1,815
$1,159
Save $656
From SEA
Elite
Nov 16
Philadelphia, United States
90% AI deal score
$1,826
$1,159
Save $667
From SEA
Elite
Nov 15
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 01
Philadelphia, United States
90% AI deal score
$1,815
$1,159
Save $656
From SEA
Elite
Nov 15
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 04
Philadelphia, United States
90% AI deal score
$1,816
$1,159
Save $657
From SEA
Elite
Nov 14
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 16
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 18
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 02
Philadelphia, United States
90% AI deal score
$1,815
$1,159
Save $656
From SEA
Elite
Nov 01
Philadelphia, United States
90% AI deal score
$1,815
$1,159
Save $656
From SEA
Elite
Nov 12
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 16
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 06
Philadelphia, United States
90% AI deal score
$1,815
$1,159
Save $656
From SEA
Elite
Nov 12
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 11
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 14
Philadelphia, United States
90% AI deal score
$1,814
$1,159
Save $655
From SEA
Elite
Nov 07
Philadelphia, United States
90% AI deal score
$1,815
$1,159
Save $656
From SEA
Elite
Nov 02
Philadelphia, United States
90% AI deal score
$1,815
$1,159
Save $656
From SEA
Elite
Nov 10
Philadelphia, United States
90% AI deal score
$1,815
$1,159
Save $656
From SEA
Elite
Nov 18
Philadelphia, United States
90% AI deal score
$1,826
$1,159
Save $667
From SEA
Elite
Nov 04
Philadelphia, United States
90% AI deal score
$1,827
$1,159
Save $668
From SEA
Elite
Nov 15
Philadelphia, United States
90% AI deal score
$1,829
$1,159
Save $670
From SEA
Elite
Oct 06
Philadelphia, United States
90% AI deal score
$1,649
$971
Save $678
From SEA
Elite
Oct 07
Philadelphia, United States
90% AI deal score
$1,660
$971
Save $689
From SEA
Elite
Aug 13
Philadelphia, United States
90% AI deal score
$1,692
$974
Save $718
From SEA
Elite
Sep 10
Philadelphia, United States
90% AI deal score
$1,656
$983
Save $673
From SEA
Elite
Aug 14
Philadelphia, United States
90% AI deal score
$1,678
$1,010
Save $668
From SEA
Elite
Aug 14
Philadelphia, United States
90% AI deal score
$1,686
$1,010
Save $676
From SEA
Elite
Aug 13
Philadelphia, United States
90% AI deal score
$1,666
$1,017
Save $649
From SEA
Elite
Jul 10
Philadelphia, United States
90% AI deal score
$1,659
$1,048
Save $611
From SEA
Elite
Jun 17
Philadelphia, United States
90% AI deal score
$1,523
$1,053
Save $470
From SEA
Elite
Jun 17
Philadelphia, United States
90% AI deal score
$1,555
$1,053
Save $502
From SEA
Elite
Aug 11
Philadelphia, United States
89% AI deal score
$1,752
$1,164
Save $588
From SEA
Elite
Dec 10
Philadelphia, United States
89% AI deal score
$1,670
$1,159
Save $511
From SEA
Elite
Dec 03
Philadelphia, United States
89% AI deal score
$1,678
$1,159
Save $519
From SEA
Elite
Dec 09
Philadelphia, United States
89% AI deal score
$1,659
$1,159
Save $500
From SEA
Elite
Jul 09
Philadelphia, United States
89% AI deal score
$1,486
$996
Save $490
From SEA
Elite
Aug 05
Philadelphia, United States
89% AI deal score
$1,666
$1,017
Save $649
From SEA
Elite
Aug 13
Philadelphia, United States
89% AI deal score
$1,664
$1,018
Save $646
From SEA
Elite
Oct 15
Philadelphia, United States
89% AI deal score
$1,649
$1,021
Save $628
From SEA
Elite
Dec 04
Philadelphia, United States
88% AI deal score
$1,552
$1,097
Save $455
From SEA
Elite
Nov 23
Philadelphia, United States
88% AI deal score
$1,560
$1,067
Save $493
From SEA
Elite
Dec 03
Philadelphia, United States
87% AI deal score
$1,504
$1,097
Save $407
From SEA
Elite
Aug 03
Philadelphia, United States
87% AI deal score
$1,607
$1,169
Save $438
From SEA
Elite
Aug 03
Philadelphia, United States
87% AI deal score
$1,603
$1,169
Save $434
From SEA
Elite
Sep 29
Philadelphia, United States
87% AI deal score
$1,547
$1,159
Save $388
From SEA
Elite
Oct 02
Philadelphia, United States
86% AI deal score
$1,617
$1,213
Save $404
From SEA
Elite
Oct 01
Philadelphia, United States
86% AI deal score
$1,626
$1,213
Save $413
From SEA
Elite
Aug 06
Philadelphia, United States
86% AI deal score
$1,614
$1,213
Save $401
From SEA
Elite
Sep 01
Philadelphia, United States
86% AI deal score
$1,477
$1,159
Save $318
From SEA
Elite
Sep 29
Philadelphia, United States
86% AI deal score
$1,479
$1,159
Save $320
From SEA
Elite
Jun 18
Philadelphia, United States
86% AI deal score
$1,538
$1,242
Save $296
From SEA
Elite
Oct 06
Philadelphia, United States
85% AI deal score
$1,502
$1,159
Save $343
From SEA
Elite
Oct 04
Philadelphia, United States
85% AI deal score
$1,494
$1,159
Save $335
From SEA
Elite
Oct 05
Philadelphia, United States
85% AI deal score
$1,497
$1,160
Save $337
From SEA
Elite
Sep 29
Philadelphia, United States
85% AI deal score
$1,419
$1,159
Save $260
From SEA
Elite
Sep 29
Philadelphia, United States
85% AI deal score
$1,419
$1,159
Save $260
From SEA
Elite
Aug 12
Philadelphia, United States
85% AI deal score
$1,385
$1,164
Save $221
From SEA
Elite
Aug 12
Philadelphia, United States
85% AI deal score
$1,388
$1,164
Save $224
From SEA
Elite
Aug 12
Philadelphia, United States
85% AI deal score
$1,372
$1,164
Save $208
From SEA
Elite
Jul 04
Philadelphia, United States
84% AI deal score
$1,533
$1,227
Save $306
From SEA
Elite
Nov 27
Philadelphia, United States
80% AI deal score
$1,379
$1,166
Save $213
From SEA
Elite
Jul 29
Philadelphia, United States
80% AI deal score
$1,452
$1,169
Save $283
From SEA
Elite
Jul 29
Philadelphia, United States
80% AI deal score
$1,429
$1,170
Save $259
From SEA
Elite
Jul 08
Philadelphia, United States
80% AI deal score
$1,495
$1,203
Save $292
From SEA
Elite
Jul 15
Philadelphia, United States
80% AI deal score
$1,481
$1,203
Save $278
From SEA
Elite
Jul 22
Philadelphia, United States
80% AI deal score
$1,479
$1,205
Save $274
From SEA
Elite
Jul 08
Philadelphia, United States
80% AI deal score
$1,559
$1,207
Save $352
From SEA
Elite
Jul 08
Philadelphia, United States
80% AI deal score
$1,492
$1,208
Save $284
From SEA
Elite
Jul 15
Philadelphia, United States
80% AI deal score
$1,472
$1,208
Save $264
From SEA
Elite
Jul 08
Philadelphia, United States
80% AI deal score
$1,484
$1,208
Save $276
From SEA
Elite
Oct 15
Philadelphia, United States
80% AI deal score
$1,548
$1,213
Save $335
From SEA
Elite
Jul 15
Philadelphia, United States
79% AI deal score
$1,431
$1,208
Save $223
From SEA
Elite
Jul 15
Philadelphia, United States
79% AI deal score
$1,433
$1,208
Save $225
From SEA
Elite
Jul 15
Philadelphia, United States
79% AI deal score
$1,458
$1,208
Save $250
From SEA
Elite
Aug 03
Philadelphia, United States
79% AI deal score
$1,540
$1,288
Save $252
From SEA
Elite
Jul 24
Philadelphia, United States
78% AI deal score
$1,567
$1,310
Save $257
From SEA
Elite
Nov 21
Philadelphia, United States
77% AI deal score
$1,350
$1,212
Save $138
From SEA
Elite
Jul 29
Philadelphia, United States
77% AI deal score
$1,422
$1,289
Save $133
From SEA
Elite
Aug 30
Philadelphia, United States
77% AI deal score
$1,393
$1,283
Save $110
From SEA
Elite
Aug 12
Philadelphia, United States
77% AI deal score
$1,403
$1,288
Save $115