Route reliability
Des Moines (DSM) to Chicago (ORD): which airline is most on time?
On-time arrivals, cancellations and long delays for every airline that reported nonstop flights from Des Moines, IA (DSM) to Chicago, IL (ORD), September 2025 to August 2026.
Des Moines, IAChicago, IL
Route at a glance · September 2025 to August 2026
DSM to ORD
Des Moines, IA to Chicago, IL
- On time
- 70.5%vs 75.6% U.S. average Worse than average
- Cancelled
- 4.1%vs 1.9% U.S. average Worse than average
- 60+ min late
- 10.9%vs 8.1% U.S. average Worse than average
- Scheduled flights
- 3,396in 12 months6 airlines
- Most reliable airline
- Republic Airways75.5% on time · 611 flights
On time less often than the U.S. average, with more cancellations.
Airlines on this route
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Diverted | Flights |
|---|---|---|---|---|---|---|
| 1. American Airlines Small sample (under 300 flights) | 82.6% | 5.5% | 6.0% | 135 min | 0.0% | 201 |
| 2. Republic Airways Operating carrier; sold as American Eagle, Delta Connection, United Express Most reliable | 75.5% | 4.4% | 9.8% | 92 min | 0.0% | 611 |
| 3. United Airlines | 72.6% | 1.7% | 8.9% | 82 min | 0.6% | 1,019 |
| 4. Envoy Air Operating carrier; sold as American Eagle | 72.3% | 3.1% | 9.3% | 76 min | 0.4% | 484 |
| 5. SkyWest Airlines Operating carrier; sold as United Express, Delta Connection, American Eagle, Alaska | 62.6% | 6.3% | 14.9% | 116 min | 0.0% | 1,080 |
| PSA Airlines Operating carrier; sold as American Eagle | Insufficient sample (fewer than 50 flights) | 1 | ||||
On time = arrived within 15 minutes of schedule. Avg delay when late = average arrival delay of flights 15+ minutes late. "Most reliable" needs at least 300 flights in 12 months. Tap a heading to sort.
What this means
Republic Airways has the strongest record on this route.
- Republic Airways had the best on-time record from Des Moines (DSM) to Chicago (ORD): 75.5% of its 611 scheduled flights arrived within 15 minutes of schedule, compared with 62.6% for SkyWest Airlines.
- American Airlines (82.6% on 201 flights) scored higher but flew the route far less often, so that result is less certain.
- PSA Airlines also flew this route but with fewer than 50 reported flights, too few to rate.
- 4.1% of flights on this route were cancelled (about 1 in 24), 2.2 points higher than the U.S. average of 1.9%.
- 10.9% of flights, about 1 in 9, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 97 min.
- Overall, 70.5% of flights on this route arrived on time, 5.1 points lower than the U.S. average of 75.6%.
- Over the last 3 years, February was the most reliable month on this route (83.0% on time) and July the least reliable (66.3%).
- Cancellations peaked in July, when 5.6% of flights were cancelled.
- Flights scheduled to depart before 6 am were the most punctual (83.6% on time); flights scheduled to depart 7 pm to 8 pm were the least (47.0%).
- In the other direction, Chicago (ORD) to Des Moines (DSM), 68.0% of flights were on time and 3.6% were cancelled. Compare airlines ORD to DSM.
Best and worst months to fly DSM to ORD
Share of scheduled flights on time 12-month average 70.5%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 71.5% | 509 |
| February | 83.0% | 499 |
| March | 73.3% | 649 |
| April | 79.5% | 772 |
| May | 78.1% | 757 |
| June | 69.8% | 689 |
| July | 66.3% | 751 |
| August | 69.0% | 774 |
| September | 81.3% | 648 |
| October | 79.8% | 663 |
| November | 78.9% | 531 |
| December | 69.7% | 548 |
| Airline | Best month | Worst month |
|---|---|---|
| American Airlines | September (91.7%) | August (75.4%) |
| Republic Airways | October (89.1%) | December (68.8%) |
| United Airlines | February (85.1%) | December (71.3%) |
| Envoy Air | October (83.3%) | July (50.7%) |
| SkyWest Airlines | September (78.5%) | January (53.7%) |
Month by month, last 12 months
Share of scheduled flights on time U.S. average 75.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Sep 2025 | 81.5% | 265 |
| Oct 2025 | 69.6% | 296 |
| Nov 2025 | 71.2% | 271 |
| Dec 2025 | 58.1% | 270 |
| Jan 2026 | 69.0% | 197 |
| Feb 2026 | 76.9% | 229 |
| Mar 2026 | 62.7% | 303 |
| Apr 2026 | 71.6% | 370 |
| May 2026 | 79.5% | 346 |
| Jun 2026 | 69.4% | 268 |
| Jul 2026 | 69.2% | 302 |
| Aug 2026 | 65.9% | 279 |
Best and worst departure times
Share of scheduled flights on time
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing before 6 am | 83.6% | 226 |
| Departing 6 am to 7 am | 80.9% | 298 |
| Departing 7 am to 8 am | 80.2% | 131 |
| Departing 8 am to 9 am | 81.4% | 490 |
| Departing 9 am to 10 am | 83.3% | 72 |
| Departing 10 am to 11 am | 71.8% | 110 |
| Departing 11 am to noon | 71.6% | 398 |
| Departing noon to 1 pm | 66.1% | 59 |
| Departing 1 pm to 2 pm | 71.1% | 356 |
| Departing 2 pm to 3 pm | 79.8% | 99 |
| Departing 3 pm to 4 pm | 64.4% | 337 |
| Departing 4 pm to 5 pm | Insufficient sample | 47 |
| Departing 5 pm to 6 pm | 70.9% | 86 |
| Departing 6 pm to 7 pm | 51.9% | 378 |
| Departing 7 pm to 8 pm | 47.0% | 185 |
| Departing 8 pm to 9 pm | 63.6% | 121 |
| Departing 9 pm to 10 pm | Insufficient sample | 3 |
Sources & data dates
- Source
- U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
- Period
- September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
- Data through
- August 2026
- Processed
- 2026-11-03
- Scope
- Nonstop scheduled flights from Des Moines, IA (DSM) to Chicago, IL (ORD), one direction. Airlines that report to the DOT only.
- Method
- Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.