Flight number record
DL 2151
Delta Air Lines · Minneapolis to Portland
- Route
- MSP → PDX
- Departs
- 18:45
- Flights
- 355
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2151, check with Delta Air Lines.
DL 2151 lands a B+, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That rests on 355 flights, with a median arrival 3 minutes early.
Key figures
On time
76.2%
Arrivals under 15 minutes late, of 353 completed flights
Avg delay
48 min
Across delayed arrivals only, not all flights
Cancelled
0.56%
National rate is 1.89%
1 hour+ late
6.2%
National rate is 8.3%
These figures cover 355 flights between September 2025 and August 2026. The median arrival is 3 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When DL 2151 flies
DL 2151 flies MSP to PDX without a single fixed slot. Its most common scheduled departure was 18:45, used on 73 of 355 flights, with 18:34 (57 flights) and 18:40 (52 flights) next.
- Departs 18:4573 flights20.6%
- Departs 18:3457 flights16.1%
- Departs 18:4052 flights14.6%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 18:45 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 2151 runs 8 points better at 76.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 2151 next to MSP to PDX
Every carrier on MSP to PDX combined arrived on time 81.7% of the time across 1,577 flights, so DL 2151 is 6 points behind it. Delta flew 1,332 flights on the same city pair under all its flight numbers, including this one, and those ran 81.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2151thin sample | 355 | 76.2% | 48 min | 0.56% | B+ |
| All Delta Air Lines on MSP–PDX | 1,332 | 81.4% | 51 min | 0.53% | B+ |
| All carriers on MSP–PDX | 1,577 | 81.7% | 53 min | 0.63% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2151 quarter by quarter
DL 2151 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jan–Mar 2026 at 63.6%, a swing of 26 points on roughly 71 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202589 flights69.7%
- Jan–Mar 202690 flights63.6%
- Apr–Jun 202684 flights84.5%
- Jul–Sep 202662 flights85.5%
Scale runs 55% to 95%.
By weekday, DL 2151 did best on Monday at 83.0% on time and worst on Thursday at 66.7%. Each day rests on about 51 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2151 runs when it is late
The 84 late arrivals split 39 under half an hour, 23 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early77 flights21.8%
- Within 15 min192 flights54.4%
- 15–29 min late39 flights11.0%
- 30–59 min late23 flights6.5%
- 1–2 hours late15 flights4.2%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 353 completed flights by arrival against schedule.
10 of 61 late departures made up the time and arrived on time, 16% of them. In the other direction, 33 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at PDX.
The worst days
Worst days for DL 2151
The latest arrival of the period was on 18 October 2025, 3 hours 41 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across October, December and January, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 October 2025 | 3 hours 41 minutes | Carrier |
| 28 December 2025 | 3 hours 9 minutes | Extreme weather |
| 9 December 2025 | 3 hours 8 minutes | Extreme weather |
| 3 January 2026 | 2 hours 35 minutes | Carrier |
| 16 January 2026 | 2 hours 15 minutes | Late-arriving aircraft |
Delay causes
Why DL 2151 runs late
Carrier accounts for 49% of the 4,059 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Carrier
- 28%National Airspace System
- 14%Late-arriving aircraft
- 8%Extreme weather
The largest share of delay minutes, 49%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,001 of the 4,059 delay minutes reported here. The split is drawn from 4,059 delay minutes reported on DL 2151.
Cancellations are rare at 0.56%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
6.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last roughly 50 minutes, which a normal layover absorbs.
The 1,426 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 355 flights under DL 2151 in the data flew MSP to PDX. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 355 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking DL 2151
For a booking, DL 2151 is one of the weaker ways to fly MSP to PDX: 6 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- MSP to PDX, every carrier and departure
- PDX to MSP, the return direction
- Delta Air Lines 2167 on the same route87.6%
- Delta Air Lines 2415 on the same route87.2%
- Minneapolis-St Paul International (MSP) delay statistics
- Portland International (PDX) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.