| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jul 19 | SEA | BOS | 12:48 | 20:17 |
Landed
|
Track > |
| Jul 17 | SEA | BOS | 12:16 | 19:55 |
Landed
|
Track > |
| Jul 16 | SEA | BOS | 13:56 | 21:31 |
Delayed
|
Track > |
| Jul 15 | SEA | BOS | 12:42 | 20:17 |
Landed
|
Track > |
| Jul 14 | SEA | BOS | 12:19 | 19:57 |
Landed
|
Track > |
| Jul 13 | SEA | BOS | 12:06 | 19:59 |
Landed
|
Track > |
| Jul 12 | SEA | BOS | 12:13 | 20:02 |
Landed
|
Track > |
| Jul 10 | SEA | BOS | 12:16 | 20:10 |
Landed
|
Track > |
| Jul 09 | SEA | BOS | 12:24 | 20:06 |
Landed
|
Track > |
| Jul 08 | SEA | BOS | 12:29 | 20:22 |
Landed
|
Track > |
TAP Portugal Flight TP4478 connects Seattle, United States to Boston, United States, taking off from Seattle Tacoma International Airport SEA and landing at Boston Logan International Airport BOS.
How long is the TP4478 flight from Seattle to Boston?
The average flight time from Seattle to Boston is 4 hours and 42 minutes. The flight distance is 4005 km / 2489 miles and the average flight speed is 851 km/h / 529 mph.
How many TP4478 flights are operated per week?
5 flights per week. The flight TP4478 is operated on Tuesday, Wednesday, Thursday, Friday and Sunday.
What is the On-Time Performance (OTP) of TAP Portugal Flight TP4478 Seattle to Boston?
The Airportia On-Time Performance Rating for TAP Portugal Flight TP4478 is 4.8/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight TP4478 arriving at?
Flight TP4478 arrives at Boston Logan International Airport (BOS) Terminal C.
When was the latest TP4478 flight?
The latest flight took off on Monday, July 20th, 2026 with the flight status being Landed on 20:17.
How else can the flight TP4478 be referenced as?
This TAP Portugal flight can also be referenced as TAP4478, TP 4478, TAP 4478.
How often is flight TP4478 delayed?
On average, 40% of all TP4478 flights are delayed. The average delay is 23 minutes.
Can I get compensation for my delayed or cancelled TP4478 flight or baggage issues?
If your TP4478 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our TP4478 Flight Tracker above for more details.
Other flights departing from Seattle SEA: B6398, DL2449, DL3789, DL358
Other flights arriving at Boston BOS: B61534, B6398, B61782, DL5837
All flights connecting Seattle SEA to Boston BOS.
