DL474Delta Air Lines · SEA → BOS
live · 46m ago
Route confirmed Delta Air Lines

DL474 SeattleSEA · 15:59 BostonBOS · 00:17

DL474 by Delta Air Lines flies from Seattle (SEA) to Boston (BOS) for the Tue, Aug 18 departure.

Right nowEstimated · gate A10 · as of 07:48
16:00

departs SEA · 1 min late

Typical gate push+1 minmedian posted departure
Typical arrival−7 minmedian over 6 operations
Wins back in air~8 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 6 operations · gate push → arrival
0+69+138+207 min
08-18
+1 gate · −7 arrival
08-17
−7 arrival
08-16
−20 arrival
08-14
+207 arrival
08-13
−30 arrival
08-12
−38 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival −7 min · 0 cancelled · 6 operations tracked

The route today

live boards
SEASeattleHigh riskSEA delay board →
BOSBostonOn-time likelyBOS delay board →
SEA→BOSevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
52%Chance of 15+ min delay
3.1%Chance of cancellation
+25 minAvg hub delay right now

Driven mainly by BOS (Boston), currently flying MVFR (marginal visual). For this route and airline, under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Seattle to Boston flights today

same route · Delta Air Lines
DL459departs 07:38
DL438departs 11:15
DL473departs 23:13

If DL474 is cancelled, these are the other Delta Air Lines nonstop flights from Seattle to Boston on the same day, with scheduled departure times in SEA local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How DL474 actually runs

Pro Flight Search has tracked every published board update for DL474 across the SEA and BOS boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 6 confirmed landings · 5/6 within 15 min of schedule.

The verdict above is that record speaking, so it reflects how DL474 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
08-18SEA 15:59 16:00 (+1)BOS 00:17 00:10 (−7)
08-17SEA 15:59BOS 00:17 00:10 (−7)
08-16SEA 15:59BOS 00:17 23:57 (−20)
08-14SEA 15:59BOS 00:17 03:44 (+207)
08-13SEA BOS 00:17 23:47 (−30)
08-12SEA BOS 00:17 23:39 (−38)

Aircraft

Recent tails: N609DN, N574D, N511DE, N514DE.

Board clocks recorded as SEA and BOS published them.

Planning around DL474? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — DL474 Seattle to Boston on-time performance, measured from the SEA and BOS airport boards.

Canonical URL
https://proflightsearch.com/flight/DL474
How we measure this →