UA3431United Airlines · IAD → YYZ
live · 9m ago
Route confirmed United Airlines

UA3431 WashingtonIAD · 08:28 TorontoYYZ · 10:04

UA3431 by United Airlines flies from Washington (IAD) to Toronto (YYZ).

Right nowNext departure tomorrow Operates daily
07:19

scheduled from IAD

⚖ UA3431 typically leaves +18 and lands −16. The air wins minutes back.
Typical gate push+18 minmedian posted departure
Typical arrival−16 minmedian over 13 operations
Wins back in air~34 minmedian gate push vs arrival · how planes make up time → Cancellation0 in 13tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
09-19
+23 gate · −14 arrival
09-18
+23 gate · −14 arrival
09-17
+21 gate · −16 arrival
09-16
+18 gate · −16 arrival
09-15
+5 gate · −30 arrival
09-14
+44 gate · +5 arrival
09-13
+31 gate · −7 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 −16 min · 0 cancelled · 13 operations tracked

The route today

live boards
IADWashingtonOn-time likelyIAD delay board →
YYZTorontoOn-time likelyYYZ delay board →
IAD→YYZevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
41%Chance of 15+ min delay
5.7%Chance of cancellation
+12 minAvg hub delay right now

Driven mainly by YYZ (Toronto), currently flying VFR (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 Washington to Toronto flights today

same route · United Airlines
UA3490departs 12:43
UA3453departs 17:17
UA3515departs 22:19

If UA3431 is cancelled, these are the other United Airlines nonstop flights from Washington to Toronto on the same day, with scheduled departure times in IAD local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How UA3431 actually runs

Pro Flight Search has tracked every published board update for UA3431 across the IAD and YYZ boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 13 confirmed landings · 13/13 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how UA3431 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
09-19IAD 08:28 08:51 (+23)YYZ 10:04 09:50 (−14)
09-18IAD 08:28 08:51 (+23)YYZ 10:04 09:50 (−14)
09-17IAD 08:28 08:49 (+21)YYZ 10:04 09:48 (−16)
09-16IAD 08:28 08:46 (+18)YYZ 10:04 09:48 (−16)
09-15IAD 08:28 08:33 (+5)YYZ 10:04 09:34 (−30)
09-14IAD 08:28 09:12 (+44)YYZ 10:04 10:09 (+5)
09-13IAD 08:28 08:59 (+31)YYZ 10:04 09:57 (−7)
09-11IAD 08:28 08:55 (+27)YYZ 10:04 09:53 (−11)
09-10IAD 08:28 08:43 (+15)YYZ 10:04 09:42 (−22)
09-09IAD 08:28 08:43 (+15)YYZ 10:04 09:42 (−22)
09-08IAD 08:28 08:40 (+12)YYZ 10:04 09:39 (−25)
09-07IAD 08:28 08:43 (+15)YYZ 10:04 09:46 (−18)
09-06IAD 08:28 08:44 (+16)YYZ 10:04 09:43 (−21)

Aircraft

Recent tails: N750YX, N732YX, N725YX, N765YX.

Board clocks recorded as IAD and YYZ published them.

Planning around UA3431? 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 — UA3431 Washington to Toronto on-time performance, measured from the IAD and YYZ airport boards.

Canonical URL
https://proflightsearch.com/flight/UA3431
How we measure this →