DL859Delta Air Lines · BOS → SLC
live · 28m ago
Route confirmed Delta Air Lines

DL859 BostonBOS · 06:05 Salt Lake CitySLC · 09:30

DL859 by Delta Air Lines flies from Boston (BOS) to Salt Lake City (SLC) for the Mon, Nov 2 departure.

Right nowEn route to Salt Lake City · off blocks 06:00 · 5 min early
09:03

estimated arrival at SLC · local time · ~26 min from now

En routeDL859 · position estimated
BOSBostonSLCSalt Lake City
Estimated from the boardsarr 09:03

Board estimate · gate and arrival times. Off blocks 06:00 · typical taxi-out at BOS ≈ 9.1 min. No receiver coverage over open ocean.

Typical gate push−5 minmedian posted departure
Typical arrival−8 minmedian over 6 operations
Wins back in air~3 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
11-02
−5 gate · −27 arrival
11-01
−5 gate · −14 arrival
10-31
−5 gate · +1 arrival
10-30
−5 gate · −8 arrival
10-29
+5 gate · +5 arrival
10-28
−5 gate · −8 arrival
10-27
−5 gate

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 −8 min · 0 cancelled · 7 operations tracked

The route today

live boards
BOSBostonOn-time likelyBOS delay board →
SLCSalt Lake CityOn-time likelySLC delay board →
BOS→SLCevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
36%Chance of 15+ min delay
2.3%Chance of cancellation
+5 minTypical airport delay in this weather

Conditions at BOS and SLC are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records 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 →

Tomorrow at Boston

Forecast

Tue 3 Nov, local date

High21°Clikely 19°C to 23°C
Low11°Clikely 9°C to 13°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at Salt Lake City

Forecast

Tue 3 Nov, local date

High12°Clikely 11°C to 14°C
Low3°Clikely 1°C to 4°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

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 Boston to Salt Lake City flights today

same route · Delta Air Lines
DL464departs 11:15
DL445departs 18:50

If DL859 is cancelled, these are the other Delta Air Lines nonstop flights from Boston to Salt Lake City on the same day, with scheduled departure times in BOS local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How DL859 actually runs

Pro Flight Search has tracked every published board update for DL859 across the BOS and SLC boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 5 confirmed landings · 5/5 within 15 min of schedule.

The verdict above is that record speaking, so it reflects how DL859 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
11-02BOS 06:05 06:00 (−5)SLC 09:30 09:03 (−27)
11-01BOS 06:05 06:00 (−5)SLC 09:30 09:16 (−14)
10-31BOS 06:05 06:00 (−5)SLC 09:30 09:31 (+1)
10-30BOS 06:05 06:00 (−5)SLC 09:30 09:22 (−8)
10-29BOS 06:05 06:10 (+5)SLC 09:30 09:35 (+5)
10-28BOS 06:05 06:00 (−5)SLC 09:30 09:22 (−8)
10-27BOS 06:05 06:00 (−5)SLC

Aircraft

Recent tails: N603DN, N615DN, N616DN, N518DQ.

Board clocks recorded as BOS and SLC published them.

Planning around DL859? 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: DL859 Boston to Salt Lake City on-time performance, measured from the BOS and SLC airport boards.

Canonical URL
https://proflightsearch.com/flight/DL859
How we measure this →