Route reliability record
DFW→BOI
Dallas-Fort Worth to Boise
- Flights
- 817
- Period
- September 2025 to August 2026
- Distance
- 1,272 mi
- Carriers
- 1
This route draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 817 DFW to BOI flights, with a median arrival 4 minutes late.
Best time to fly DFW to BOI: a 8am–11am departure, ideally on a Wednesday. Flights in that window arrived on time 79.0% of the time and Wednesday flights 75.2%, against 63.3% for the route overall.
The national on-time rate over the same period is 77.3%, so this route runs 14 points behind the country as a whole. Across a thousand flights that is about 140 extra late arrivals.
Key figures
On time
63.3%
Arrivals under 15 minutes late, of 795 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
2.69%
National rate is 1.89%
Best carrier
American
63.3% on time across 817 flights
These figures cover 817 flights between September 2025 and August 2026. Beyond the headline rate, 13.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on DFW to BOI
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlines | 817 | 63.3% | 65 min | 2.69% | D |
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Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 33 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am363 flights79.0%
- 11am–2pm91 flights54.4%
- 2pm–5pm—
- 5pm–8pm112 flights57.5%
- 8pm–5am251 flights45.9%
Scale runs 35% to 85%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 45.9% on time, against 79.0% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 363 flights scheduled in it.
Explore
Filter DFW to BOI by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On DFW to BOI, the best departure window is 8am–11am at 79.0% on time and the worst is 8pm–5am at 45.9%, a wide gap of 33.1 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am—
- 8–11am79.0%
- 11am–2pm54.4%
- 2–5pm—
- 5–8pm57.5%
- 8pm–5am45.9%
best all US flightsScale 35% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 29 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
June is the worst month at 43.5% on time, 29 points below May, the best at 72.9%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. July was the busiest month here, with 91 flights.
Across the week, Wednesday is the strongest day at 75.2% on time and Monday the weakest at 52.1%, a spread of 23 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 51% of the 19,000 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 36%Carrier
- 12%National Airspace System
- 2%Extreme weather
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 19,000 reported delay minutes here, that single category outweighs weather by 33 to one. The split is drawn from 18,942 reported delay minutes.
The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 6,726 of the 19,000 delay minutes reported here.
Cancellations run at 2.69%, against 1.89% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here actually costs
13.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 1,272 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.
The return leg is a different operation and performs like one: it runs 81.6% on time across 817 flights, 18 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 18 points of difference.
One caution: this is a thin sample. 817 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.
Work out the risk of missing a connection in BOI after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 817 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 63.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 795 completed flights over 12 months sit behind that.
Common questions
DFW to BOI questions
How often is DFW to BOI delayed?
Roughly one flight in three arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 36.7% of the 817 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
How reliable is DFW to BOI compared with the rest of the country?
63.3% of flights arrive on time here against a national 77.3%, a difference of 14 points against it. That is worth a D on this site's grading scale.
What time of day has the fewest delays on DFW to BOI?
The 8am–11am departure window is the strongest at 79.0% on time. The 8pm–5am window is the weakest at 45.9%, 33 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are June delays on DFW to BOI?
June is the weakest month at 43.5% on time, compared with 72.9% in May. Across the year that is 29 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- BOI to DFW — the return legseparate record
- Dallas/Fort Worth International (DFW) delay statistics
- DFW to ORD, a related route68.8%
- SEA to BOI, a related route86.3%
- DFW to ATL, a related route75.6%
- American Airlines on-time record63.3%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. DFW to BOI and BOI to DFW are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.