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466 km · Domestic

Boise Air Terminal/Gowen Field (BOI) – Salt Lake City (SLC)

In July 2026, 298 flights operated between Boise Air Terminal/Gowen Field and Salt Lake City (both directions), and 85.6% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January252244▼ 3.2%
February2242240.0%
March276295▲ 6.9%
April272298▲ 9.6%
May296310▲ 4.7%
June290287▼ 1.0%
July299298▼ 0.3%
August310––
September300––
October310–in progress
November283––
December291––
Year to date (Jan–Jul)1,9091,956▲ 2.5%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January88.9%84.8%▼ 4.6%
February85.3%87.1%▲ 2.1%
March88.4%91.9%▲ 4.0%
April88.6%91.6%▲ 3.4%
May88.9%89.7%▲ 0.9%
June86.9%87.8%▲ 1.0%
July89.3%85.6%▼ 4.1%
August89.0%––
September90.3%––
October88.1%–in progress
November90.1%––
December82.8%––
Year-to-date average (Jan–Jul)88.0%88.4%▲ 0.4%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January24▲ 100.0%
February00–
March00–
April02–
May00–
June47▲ 75.0%
July00–
August0––
September0––
October0–in progress
November11––
December7––
Year to date (Jan–Jul)613▲ 116.7%

Airlines on this route

  1. Delta Air Lines 77.1%
  2. SkyWest Airlines 22.9%

Oct 1, 2024 – Jul 31, 2026

By direction

BOI → SLC

Scheduled flights
3,071
Flights operated
3,051
Cancelled
20 · 0.7%
On-time departures
91.1%

SLC → BOI

Scheduled flights
3,073
Flights operated
3,056
Cancelled
17 · 0.6%
On-time departures
85.5%

BOI → SLC and SLC → BOI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Delta Air Lines DL 4,738 77.1% 86.9% 35
SkyWest Airlines OO 1,406 22.9% 92.8% 2

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay08:00–09:00-1.8min · 858 recorded · 852 measured
Gap to highest-delay hour18.6min08:00 ↔ 22:00
Recorded flights6,144BOI–SLC

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · 96.1% · 204 recorded · 204 measured · Source: the US BTS 06:00 · 92.3% · 446 recorded · 440 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 8 recorded · 8 measured · Source: the US BTS 08:00 · 92.6% · 858 recorded · 852 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 119 recorded · 119 measured · Source: the US BTS 10:00 · 84.8% · 550 recorded · 547 measured · Source: the US BTS 11:00 · 90.4% · 755 recorded · 749 measured · Source: the US BTS 12:00 · 87.6% · 251 recorded · 250 measured · Source: the US BTS 13:00 · 85.0% · 404 recorded · 401 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · 87.3% · 437 recorded · 434 measured · Source: the US BTS 16:00 · 88.2% · 220 recorded · 220 measured · Source: the US BTS 17:00 · 89.0% · 485 recorded · 483 measured · Source: the US BTS 18:00 · 89.6% · 318 recorded · 316 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 98 recorded · 98 measured · Source: the US BTS 20:00 · 88.5% · 296 recorded · 296 measured · Source: the US BTS 21:00 · 84.8% · 223 recorded · 223 measured · Source: the US BTS 22:00 · 78.9% · 311 recorded · 308 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 161 recorded · 159 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · 4.0 min · 204 recorded · 204 measured · Source: the US BTS 06:00 · 5.1 min · 446 recorded · 440 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 8 recorded · 8 measured · Source: the US BTS 08:00 · -1.8 min · 858 recorded · 852 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 119 recorded · 119 measured · Source: the US BTS 10:00 · 5.8 min · 550 recorded · 547 measured · Source: the US BTS 11:00 · 2.0 min · 755 recorded · 749 measured · Source: the US BTS 12:00 · 7.0 min · 251 recorded · 250 measured · Source: the US BTS 13:00 · 4.3 min · 404 recorded · 401 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · 3.7 min · 437 recorded · 434 measured · Source: the US BTS 16:00 · 3.9 min · 220 recorded · 220 measured · Source: the US BTS 17:00 · 0.2 min · 485 recorded · 483 measured · Source: the US BTS 18:00 · -0.6 min · 318 recorded · 316 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 98 recorded · 98 measured · Source: the US BTS 20:00 · 3.2 min · 296 recorded · 296 measured · Source: the US BTS 21:00 · 5.0 min · 223 recorded · 223 measured · Source: the US BTS 22:00 · 16.8 min · 311 recorded · 308 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 161 recorded · 159 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · 204 · 204 recorded · 204 measured · Source: the US BTS 06:00 · 446 · 446 recorded · 440 measured · Source: the US BTS 07:00 · 8 · 8 recorded · 8 measured · Source: the US BTS 08:00 · 858 · 858 recorded · 852 measured · Source: the US BTS 09:00 · 119 · 119 recorded · 119 measured · Source: the US BTS 10:00 · 550 · 550 recorded · 547 measured · Source: the US BTS 11:00 · 755 · 755 recorded · 749 measured · Source: the US BTS 12:00 · 251 · 251 recorded · 250 measured · Source: the US BTS 13:00 · 404 · 404 recorded · 401 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · 437 · 437 recorded · 434 measured · Source: the US BTS 16:00 · 220 · 220 recorded · 220 measured · Source: the US BTS 17:00 · 485 · 485 recorded · 483 measured · Source: the US BTS 18:00 · 318 · 318 recorded · 316 measured · Source: the US BTS 19:00 · 98 · 98 recorded · 98 measured · Source: the US BTS 20:00 · 296 · 296 recorded · 296 measured · Source: the US BTS 21:00 · 223 · 223 recorded · 223 measured · Source: the US BTS 22:00 · 311 · 311 recorded · 308 measured · Source: the US BTS 23:00 · 161 · 161 recorded · 159 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:0096.1%4.0 min204204
06:0092.3%5.1 min440446
07:00Fewer than 200 measured departures—88
08:0092.6%-1.8 min852858
09:00Fewer than 200 measured departures—119119
10:0084.8%5.8 min547550
11:0090.4%2.0 min749755
12:0087.6%7.0 min250251
13:0085.0%4.3 min401404
14:00No observations———
15:0087.3%3.7 min434437
16:0088.2%3.9 min220220
17:0089.0%0.2 min483485
18:0089.6%-0.6 min316318
19:00Fewer than 200 measured departures—9898
20:0088.5%3.2 min296296
21:0084.8%5.0 min223223
22:0078.9%16.8 min308311
23:00Fewer than 200 measured departures—159161

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 87.2% · 896 recorded · 887 measured · Source: the US BTS Tuesday · 90.9% · 870 recorded · 868 measured · Source: the US BTS Wednesday · 89.2% · 864 recorded · 864 measured · Source: the US BTS Thursday · 88.6% · 880 recorded · 877 measured · Source: the US BTS Friday · 86.8% · 890 recorded · 883 measured · Source: the US BTS Saturday · 87.7% · 851 recorded · 844 measured · Source: the US BTS Sunday · 87.7% · 893 recorded · 884 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 5.9 min · 896 recorded · 887 measured · Source: the US BTS Tuesday · 1.9 min · 870 recorded · 868 measured · Source: the US BTS Wednesday · 1.9 min · 864 recorded · 864 measured · Source: the US BTS Thursday · 4.8 min · 880 recorded · 877 measured · Source: the US BTS Friday · 4.3 min · 890 recorded · 883 measured · Source: the US BTS Saturday · 1.2 min · 851 recorded · 844 measured · Source: the US BTS Sunday · 4.8 min · 893 recorded · 884 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 896 · 896 recorded · 887 measured · Source: the US BTS Tuesday · 870 · 870 recorded · 868 measured · Source: the US BTS Wednesday · 864 · 864 recorded · 864 measured · Source: the US BTS Thursday · 880 · 880 recorded · 877 measured · Source: the US BTS Friday · 890 · 890 recorded · 883 measured · Source: the US BTS Saturday · 851 · 851 recorded · 844 measured · Source: the US BTS Sunday · 893 · 893 recorded · 884 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday87.2%5.9 min887896
Tuesday90.9%1.9 min868870
Wednesday89.2%1.9 min864864
Thursday88.6%4.8 min877880
Friday86.8%4.3 min883890
Saturday87.7%1.2 min844851
Sunday87.7%4.8 min884893

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 86.9% · 502 recorded · 496 measured · Source: the US BTS Feb · 86.2% · 448 recorded · 448 measured · Source: the US BTS Mar · 90.2% · 571 recorded · 571 measured · Source: the US BTS Apr · 90.2% · 572 recorded · 570 measured · Source: the US BTS May · 89.3% · 606 recorded · 606 measured · Source: the US BTS Jun · 87.4% · 588 recorded · 577 measured · Source: the US BTS Jul · 87.4% · 597 recorded · 597 measured · Source: the US BTS Aug · 89.0% · 310 recorded · 310 measured · Source: the US BTS Sep · 90.3% · 300 recorded · 300 measured · Source: the US BTS Oct · 90.3% · 494 recorded · 494 measured · Source: the US BTS Nov · 90.4% · 564 recorded · 553 measured · Source: the US BTS Dec · 82.9% · 592 recorded · 585 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 3.5 min · 502 recorded · 496 measured · Source: the US BTS Feb · 7.1 min · 448 recorded · 448 measured · Source: the US BTS Mar · 0.9 min · 571 recorded · 571 measured · Source: the US BTS Apr · 2.2 min · 572 recorded · 570 measured · Source: the US BTS May · 1.9 min · 606 recorded · 606 measured · Source: the US BTS Jun · 6.7 min · 588 recorded · 577 measured · Source: the US BTS Jul · 4.2 min · 597 recorded · 597 measured · Source: the US BTS Aug · 2.3 min · 310 recorded · 310 measured · Source: the US BTS Sep · 1.9 min · 300 recorded · 300 measured · Source: the US BTS Oct · 1.7 min · 494 recorded · 494 measured · Source: the US BTS Nov · 1.8 min · 564 recorded · 553 measured · Source: the US BTS Dec · 7.4 min · 592 recorded · 585 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 502 · 502 recorded · 496 measured · Source: the US BTS Feb · 448 · 448 recorded · 448 measured · Source: the US BTS Mar · 571 · 571 recorded · 571 measured · Source: the US BTS Apr · 572 · 572 recorded · 570 measured · Source: the US BTS May · 606 · 606 recorded · 606 measured · Source: the US BTS Jun · 588 · 588 recorded · 577 measured · Source: the US BTS Jul · 597 · 597 recorded · 597 measured · Source: the US BTS Aug · 310 · 310 recorded · 310 measured · Source: the US BTS Sep · 300 · 300 recorded · 300 measured · Source: the US BTS Oct · 494 · 494 recorded · 494 measured · Source: the US BTS Nov · 564 · 564 recorded · 553 measured · Source: the US BTS Dec · 592 · 592 recorded · 585 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan86.9%3.5 min496502
Feb86.2%7.1 min448448
Mar90.2%0.9 min571571
Apr90.2%2.2 min570572
May89.3%1.9 min606606
Jun87.4%6.7 min577588
Jul87.4%4.2 min597597
Aug89.0%2.3 min310310
Sep90.3%1.9 min300300
Oct90.3%1.7 min494494
Nov90.4%1.8 min553564
Dec82.9%7.4 min585592

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 87.7% 5,391
  • Delayed >15 min 11.7% 716
  • Cancelled 0.6% 37
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

37
37 of 37
Flight numbersBy direction DeparturesOn time
DL2173 BOI → SLC 647 93.5%
DL2111 SLC → BOI 576 78.6%
DL2095 SLC → BOI 559 82.6%
DL2095 BOI → SLC 558 85.0%
DL1744 SLC → BOI 507 88.0%
DL1744 BOI → SLC 419 93.0%
DL2005 SLC → BOI 288 86.7%
DL2005 BOI → SLC 287 90.5%
OO3503 BOI → SLC 188 95.7%
OO4021 SLC → BOI 169 89.4%
OO3607 BOI → SLC 98 95.9%
OO4446 SLC → BOI 97 88.7%
DL2920 BOI → SLC 85 84.5%
DL2920 SLC → BOI 85 82.4%
OO3725 SLC → BOI 70 92.8%
OO3725 BOI → SLC 69 95.6%
DL2506 BOI → SLC 64 87.3%
DL2004 SLC → BOI 62 85.5%
OO4028 BOI → SLC 62 90.3%
OO4028 SLC → BOI 62 88.7%
DL1442 SLC → BOI 55 83.6%
DL1442 BOI → SLC 55 92.7%
DL1754 BOI → SLC 55 87.0%
OO3665 SLC → BOI 38 100.0%
OO3615 BOI → SLC 37 78.4%
OO3615 SLC → BOI 37 86.5%
OO3665 BOI → SLC 37 97.3%
DL412 SLC → BOI 36 88.9%
OO3504 BOI → SLC 36 91.7%
OO3507 BOI → SLC 36 94.4%
OO3508 SLC → BOI 36 91.7%
OO3509 SLC → BOI 36 97.2%
DL1710 BOI → SLC 35 97.1%
DL2101 SLC → BOI 34 85.3%
DL2101 BOI → SLC 34 88.2%
OO3978 SLC → BOI 34 91.2%
OO3978 BOI → SLC 34 88.2%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 298 −0.3% 0 85.6%
June 2026 287 −1.0% 7 87.8%
May 2026 310 +4.7% 0 89.7%
April 2026 298 +9.6% 2 91.6%
March 2026 295 +6.9% 0 91.9%
February 2026 224 +0.0% 0 87.1%
January 2026 244 −3.2% 4 84.8%
December 2025 291 −1.0% 7 82.8%
November 2025 283 +4.8% 11 90.1%
October 2025 310 +68.5% 0 88.1%
September 2025 300 0 90.3%
August 2025 310 0 89.0%
July 2025 299 0 89.3%
June 2025 290 4 86.9%
May 2025 296 0 88.9%
April 2025 272 0 88.6%
March 2025 276 0 88.4%
February 2025 224 0 85.3%
January 2025 252 2 88.9%
December 2024 294 0 83.0%
November 2024 270 0 90.7%
October 2024 184 0 94.0%

How to read this chart

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