Cheap Flights from Philadelphia to Seattle
Browse current best options from Philadelphia. Become a member to unlock all deals and get alerts when new deals appear.
Deals from
Philadelphia
RatePunk searches hundreds of travel sites at once for deals on flights to Seattle
Prices updated 24 days ago
486,190 searches this week
171 airlines compared
80%+ AI score for best value
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 Philadelphia to Seattle
Explore current cheapest deals departing from Philadelphia to Seattle
Round trip
Sort by: Cheapest
September 1 - September 9
PHL - Seattle
$379
$230
Round trip
July 22 - July 27
PHL - Seattle
$317
$240
Round trip
July 17 - July 20
PHL - Seattle
$330
$240
Round trip
July 19 - July 24
PHL - Seattle
$322
$240
Round trip
August 21 - August 25
PHL - Seattle
$450
$240
Round trip
August 10 - August 18
PHL - Seattle
$417
$240
Round trip
August 17 - August 24
PHL - Seattle
$432
$240
Round trip
August 24 - August 28
PHL - Seattle
$450
$240
Round trip
August 5 - August 10
PHL - Seattle
$441
$240
Round trip
August 10 - August 14
PHL - Seattle
$455
$240
Round trip
Unlock all 500+ flight deals to Seattle and get alerts when great deals appear
Route Intelligence — 486,190 Searches this Week
Insights for flights from Philadelphia to Seattle
How much is a round trip from Philadelphia to Seattle
Regular price: $302 - $398
Prices for flights from Philadelphia to Seattle are currently below the regular range.
The regular price range for this route is between $302 and $398. The current lowest deal is $230 with Southwest Airlines, for travel from Sep 1-Sep 9.
now $230
Low $302
High $398
The cheapest time to fly from Philadelphia to Seattle
The cheapest month to fly from Philadelphia to Seattle is February, with a median price of $195. The most expensive month is July, with a median price of $854. Prices are generally lower from January to December.
February
Flights from $195
July
Flights from $854
Direct flights from Philadelphia to Seattle
Alaska Airlines, Inc.
Last-minute flights going from Philadelphia to Seattle
Wed, Jun 17
PHL - Seattle
Philadelphia (PHL) - Seattle (SEA)
Frontier Airlines
$983
$314
One-way
Wed, Jun 17
PHL - Seattle
Philadelphia (PHL) - Seattle (SEA)
Frontier Airlines
$1,162
$376
One-way
Wed, Jun 17
PHL - Seattle
Philadelphia (PHL) - Seattle (SEA)
$910
$447
One-way
Wed, Jun 17
PHL - Seattle
Philadelphia (PHL) - Seattle (SEA)
$982
$457
One-way
Wed, Jun 17
PHL - Seattle
Philadelphia (PHL) - Seattle (SEA)
$1,036
$484
One-way
Wed, Jun 17
PHL - Seattle
Philadelphia (PHL) - Seattle (SEA)
$1,146
$515
One-way
Biggest price drops on these dates for flights from Philadelphia to Seattle
Jun 20 - Jun 21
$1,153 → $344
70%
Jun 17 - Jun 18
$1,162 → $376
68%
Jun 19 - Jun 21
$1,148 → $386
66%
Jun 24 - Jun 26
$1,027 → $337
67%
Popular Airports to fly from Philadelphia to Seattle
Philadelphia - Seattle route insights
💸 Price insights
Recent fares are below the typical level
Recent fares from Philadelphia to Seattle are below the typical level at $230.
📅 Best time to fly
February is historically cheapest at $195
Historically, February is the cheapest month to fly from Philadelphia to Seattle, with a median price of $195.
⏱️ Flight duration
Typically 17h 13m to Seattle
Flights from Philadelphia to Seattle typically take 17h 13m, including layovers.
✈️ Airlines & availability
Connecting flights are dominant
Connecting flights make up 74.3% of deals, with a median of 2 stopovers.
🏆 Airline highlight
Alaska Airlines offers direct flights
Alaska Airlines, Inc. offers direct flights from Philadelphia to Seattle.
🎯 Booking tip
Deals are frequent for this route
Historically, deals for flights from Philadelphia to Seattle appear frequently.
Philadelphia main airports to depart from
Philadelphia International (PHL)
Philadelphia International Airport is a great choice for flights from Philadelphia to Seattle.
📍 ~10 km from city center (reachable by car or train)
💸 Flights from ~$230
Seattle main airports to arrive at
Seattle–Tacoma International (SEA)
Seattle–Tacoma International Airport is a primary arrival option for flights from Philadelphia to Seattle.
📍 ~19 km from Seattle city center (reachable by car, bus, or train).
💸 Flights from ~$230
Boeing Field (BFI)
Boeing Field offers an alternative arrival point for travelers flying from Philadelphia to Seattle.
📍 ~9 km from Seattle city center (reachable by car or bus).
💸 Flights from ~$773
Kenmore Air Harbor Seaplane Base (LKE)
Kenmore Air Harbor Seaplane Base provides a unique arrival experience for flights to Seattle.
📍 ~3 km from Seattle city center (reachable by car or bus).
💸 Flights from ~$1272
Airports nearby Seattle used as alternative
Paine Field Everett (PAE)
Paine Field Everett is a convenient alternative for North Seattle residents, offering shorter security wait times.
📍 ~40 km from Seattle (reachable by car)
💸 Flights from ~$348
Portland International (PDX)
Portland International is a major international hub that can be a price competitor for long-haul flights.
📍 ~230 km from Seattle (reachable by car or train)
💸 Flights from ~$255
Vancouver International (YVR)
Vancouver International is a major international gateway with extensive flight options to Asia and Europe.
📍 ~220 km from Seattle (reachable by car, requires international border crossing)
💸 Flights from ~$386
Bellingham International (BLI)
Bellingham International is a primary low-cost carrier airport with easier parking and faster processing.
📍 ~145 km from Seattle (reachable by car)
💸 Flights from ~$409
Abbotsford International (YXX)
Abbotsford International is an alternative low-cost gateway for Canadian domestic connections, with limited US service.
📍 ~160 km from Seattle (reachable by car, requires international border crossing)
💸 Flights from ~$412
Business & First Class Flight Deals to Seattle
Discover luxury on the budget with premium cabin class on flights from Philadelphia to Seattle.
Elite
Best Elite deals to Seattle
Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.
From PHL
Elite
Aug 26
Seattle, United States
90% AI deal score
$1,571
$921
Save $650
From PHL
Elite
Aug 31
Seattle, United States
90% AI deal score
$1,603
$983
Save $620
From PHL
Elite
Sep 23
Seattle, United States
89% AI deal score
$1,793
$1,133
Save $660
From PHL
Elite
Oct 24
Seattle, United States
88% AI deal score
$1,459
$1,088
Save $371
From PHL
Elite
Nov 11
Seattle, United States
88% AI deal score
$1,525
$1,093
Save $432
From PHL
Elite
Oct 06
Seattle, United States
88% AI deal score
$1,412
$601
Save $811
From PHL
Elite
Sep 17
Seattle, United States
88% AI deal score
$1,440
$952
Save $488
From PHL
Elite
Oct 02
Seattle, United States
88% AI deal score
$1,463
$993
Save $470
From PHL
Elite
Oct 02
Seattle, United States
87% AI deal score
$1,656
$1,159
Save $497
From PHL
Elite
Oct 11
Seattle, United States
87% AI deal score
$1,519
$969
Save $550
From PHL
Elite
Oct 31
Seattle, United States
87% AI deal score
$1,546
$1,159
Save $387
From PHL
Elite
Sep 12
Seattle, United States
87% AI deal score
$1,346
$921
Save $425
From PHL
Elite
Sep 09
Seattle, United States
87% AI deal score
$1,367
$931
Save $436
From PHL
Elite
Sep 01
Seattle, United States
87% AI deal score
$1,361
$952
Save $409
From PHL
Elite
Sep 19
Seattle, United States
87% AI deal score
$1,395
$952
Save $443
From PHL
Elite
Sep 05
Seattle, United States
87% AI deal score
$1,357
$953
Save $404
From PHL
Elite
Oct 10
Seattle, United States
86% AI deal score
$1,372
$959
Save $413
From PHL
Elite
Nov 07
Seattle, United States
86% AI deal score
$1,444
$959
Save $485
From PHL
Elite
Sep 22
Seattle, United States
86% AI deal score
$1,378
$1,083
Save $295
From PHL
Elite
Sep 01
Seattle, United States
86% AI deal score
$1,361
$962
Save $399
From PHL
Elite
Sep 10
Seattle, United States
86% AI deal score
$1,362
$983
Save $379
From PHL
Elite
Sep 06
Seattle, United States
86% AI deal score
$1,358
$983
Save $375
From PHL
Elite
Sep 21
Seattle, United States
86% AI deal score
$1,380
$993
Save $387
From PHL
Elite
Dec 12
Seattle, United States
85% AI deal score
$1,465
$1,159
Save $306
From PHL
Elite
Oct 06
Seattle, United States
85% AI deal score
$1,385
$959
Save $426
From PHL
Elite
Sep 05
Seattle, United States
85% AI deal score
$1,414
$993
Save $421
From PHL
Elite
Oct 25
Seattle, United States
85% AI deal score
$1,386
$1,159
Save $227
From PHL
Elite
Oct 24
Seattle, United States
85% AI deal score
$1,402
$1,159
Save $243
From PHL
Elite
Oct 24
Seattle, United States
85% AI deal score
$1,402
$1,159
Save $243
From PHL
Elite
Oct 10
Seattle, United States
85% AI deal score
$1,397
$921
Save $476
From PHL
Elite
Sep 05
Seattle, United States
84% AI deal score
$1,268
$959
Save $309
From PHL
Elite
Sep 22
Seattle, United States
84% AI deal score
$1,281
$959
Save $322
From PHL
Elite
Nov 21
Seattle, United States
84% AI deal score
$1,489
$1,103
Save $386
From PHL
Elite
Nov 07
Seattle, United States
84% AI deal score
$1,337
$931
Save $406
From PHL
Elite
Sep 10
Seattle, United States
83% AI deal score
$1,565
$1,163
Save $402
From PHL
Elite
Aug 30
Seattle, United States
83% AI deal score
$1,597
$1,104
Save $493
From PHL
Elite
Sep 01
Seattle, United States
82% AI deal score
$1,402
$1,093
Save $309
From PHL
Elite
Jul 10
Seattle, United States
82% AI deal score
$1,712
$1,272
Save $440
From PHL
Elite
Jul 09
Seattle, United States
82% AI deal score
$1,710
$1,297
Save $413
From PHL
Elite
Oct 31
Seattle, United States
81% AI deal score
$1,385
$1,159
Save $226
From PHL
Elite
Jun 27
Seattle, United States
81% AI deal score
$1,470
$1,217
Save $253
From PHL
Elite
Jul 10
Seattle, United States
81% AI deal score
$1,672
$1,282
Save $390
From PHL
Elite
Jun 27
Seattle, United States
81% AI deal score
$1,467
$1,187
Save $280
From PHL
Elite
Oct 11
Seattle, United States
80% AI deal score
$1,447
$1,159
Save $288
From PHL
Elite
Oct 11
Seattle, United States
80% AI deal score
$1,459
$1,160
Save $299
From PHL
Elite
Oct 24
Seattle, United States
80% AI deal score
$1,366
$1,159
Save $207
From PHL
Elite
Oct 25
Seattle, United States
80% AI deal score
$1,354
$1,159
Save $195
From PHL
Elite
Oct 31
Seattle, United States
80% AI deal score
$1,349
$1,159
Save $190
From PHL
Elite
Oct 11
Seattle, United States
79% AI deal score
$1,369
$1,160
Save $209
From PHL
Elite
Jul 04
Seattle, United States
79% AI deal score
$1,423
$1,163
Save $260
From PHL
Elite
Oct 04
Seattle, United States
79% AI deal score
$1,323
$1,159
Save $164
From PHL
Elite
Oct 04
Seattle, United States
79% AI deal score
$1,323
$1,159
Save $164
From PHL
Elite
Oct 31
Seattle, United States
79% AI deal score
$1,334
$1,159
Save $175
From PHL
Elite
Oct 04
Seattle, United States
79% AI deal score
$1,323
$1,159
Save $164
From PHL
Elite
Oct 11
Seattle, United States
79% AI deal score
$1,319
$1,159
Save $160
From PHL
Elite
Oct 25
Seattle, United States
79% AI deal score
$1,337
$1,159
Save $178
From PHL
Elite
Oct 24
Seattle, United States
79% AI deal score
$1,337
$1,159
Save $178
From PHL
Elite
Jul 21
Seattle, United States
78% AI deal score
$1,249
$1,109
Save $140
From PHL
Elite
Nov 18
Seattle, United States
78% AI deal score
$1,314
$1,152
Save $162
From PHL
Elite
Oct 11
Seattle, United States
78% AI deal score
$1,305
$1,159
Save $146
From PHL
Elite
Oct 11
Seattle, United States
78% AI deal score
$1,305
$1,159
Save $146
From PHL
Elite
Oct 11
Seattle, United States
78% AI deal score
$1,356
$1,159
Save $197
From PHL
Elite
Oct 11
Seattle, United States
78% AI deal score
$1,343
$1,159
Save $184
From PHL
Elite
Oct 11
Seattle, United States
78% AI deal score
$1,331
$1,159
Save $172
From PHL
Elite
Oct 11
Seattle, United States
78% AI deal score
$1,305
$1,160
Save $145
From PHL
Elite
Jun 21
Seattle, United States
78% AI deal score
$1,817
$1,507
Save $310
From PHL
Elite
Jun 22
Seattle, United States
78% AI deal score
$1,481
$1,316
Save $165
From PHL
Elite
Jul 21
Seattle, United States
77% AI deal score
$1,279
$1,157
Save $122
From PHL
Elite
Jul 22
Seattle, United States
77% AI deal score
$1,274
$1,164
Save $110
From PHL
Elite
Jul 04
Seattle, United States
77% AI deal score
$1,310
$1,164
Save $146
From PHL
Elite
Aug 11
Seattle, United States
77% AI deal score
$1,262
$1,165
Save $97
From PHL
Elite
Jun 21
Seattle, United States
77% AI deal score
$1,766
$1,507
Save $259
From PHL
Elite
Jun 21
Seattle, United States
77% AI deal score
$1,727
$1,507
Save $220
From PHL
Elite
Jul 22
Seattle, United States
76% AI deal score
$1,236
$1,159
Save $77
From PHL
Elite
Jul 23
Seattle, United States
76% AI deal score
$1,229
$1,164
Save $65
From PHL
Elite
Jul 28
Seattle, United States
76% AI deal score
$1,249
$1,164
Save $85
From PHL
Elite
Sep 06
Seattle, United States
76% AI deal score
$1,416
$1,187
Save $229
From PHL
Elite
Aug 29
Seattle, United States
75% AI deal score
$1,380
$1,188
Save $192
From PHL
Elite
Jul 21
Seattle, United States
75% AI deal score
$1,656
$1,392
Save $264
From PHL
Elite
Jul 22
Seattle, United States
75% AI deal score
$1,686
$1,392
Save $294
From PHL
Elite
Jun 19
Seattle, United States
75% AI deal score
$1,872
$1,539
Save $333
From PHL
Elite
Jul 25
Seattle, United States
74% AI deal score
$1,351
$1,218
Save $133
From PHL
Elite
Jul 23
Seattle, United States
74% AI deal score
$1,632
$1,437
Save $195
From PHL
Elite
Jul 05
Seattle, United States
74% AI deal score
$1,749
$1,523
Save $226
From PHL
Elite
Aug 03
Seattle, United States
74% AI deal score
$1,589
$1,316
Save $273
From PHL
Elite
Jul 14
Seattle, United States
73% AI deal score
$1,313
$1,221
Save $92
From PHL
Elite
Jul 22
Seattle, United States
73% AI deal score
$1,623
$1,437
Save $186
From PHL
Elite
Jul 15
Seattle, United States
73% AI deal score
$1,571
From PHL
Elite
Jul 22
Seattle, United States
72% AI deal score
$1,345
$1,263
Save $82
From PHL
Elite
Jul 21
Seattle, United States
72% AI deal score
$1,345
$1,268
Save $77
From PHL
Elite
Sep 12
Seattle, United States
72% AI deal score
$1,262
$1,188
Save $74
From PHL
Elite
Aug 05
Seattle, United States
72% AI deal score
$1,337
$1,262
Save $75
From PHL
Elite
Aug 10
Seattle, United States
72% AI deal score
$1,399
$1,316
Save $83
From PHL
Elite
Jul 23
Seattle, United States
72% AI deal score
$1,654
$1,557
Save $97
From PHL
Elite
Jul 22
Seattle, United States
72% AI deal score
$1,662
$1,562
Save $100
From PHL
Elite
Jun 18
Seattle, United States
72% AI deal score
$2,100
$1,957
Save $143
From PHL
Elite
Jul 21
Seattle, United States
71% AI deal score
$1,307
$1,268
Save $39
From PHL
Elite
Jul 23
Seattle, United States
71% AI deal score
$1,393
$1,316
Save $77
From PHL
Elite
Jul 10
Seattle, United States
71% AI deal score
$1,370
$1,310
Save $60
From PHL
Elite
Jun 19
Seattle, United States
71% AI deal score
$1,529
$1,498
Save $31