Route · BOS → IAD · 2020–2025 BTS data
Boston to Washington
The BOS–IAD corridor (Boston, MA → Washington, DC) runs ahead of the national average, served by 9 carriers across roughly 413 miles.
Data updated 2026-06-13
- 85%
- On-time
- +6 pts
- vs US avg
- 78 min
- Delay when late
- 7,615
- Flights
Cancelled
0.8%
Best Month
Feb 2024 97%
Worst Month
Jul 2025 73%
Distance
413 mi
Carriers
9
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 122 | 20 | 0 | 0 | YX,UA |
| Nov 2025 | 119 | 15 | 2 | 0 | UA |
| Oct 2025 | 124 | 33 | 1 | 0 | UA |
| Sep 2025 | 143 | 26 | 2 | 0 | UA |
| Aug 2025 | 133 | 27 | 0 | 0 | UA |
| Jul 2025 | 124 | 34 | 2 | 1 | UA |
| Jun 2025 | 146 | 35 | 0 | 0 | UA |
| May 2025 | 155 | 30 | 0 | 0 | UA,YX |
| Apr 2025 | 154 | 27 | 0 | 0 | UA |
| Mar 2025 | 125 | 16 | 0 | 0 | UA |
| Feb 2025 | 112 | 18 | 3 | 0 | UA |
| Jan 2025 | 124 | 23 | 2 | 0 | YX,UA |
| Dec 2024 | 124 | 17 | 1 | 0 | UA,YX |
| Nov 2024 | 119 | 18 | 0 | 0 | UA |
| Oct 2024 | 124 | 14 | 0 | 0 | UA |
| Sep 2024 | 120 | 8 | 0 | 0 | UA |
| Aug 2024 | 124 | 20 | 5 | 1 | UA |
| Jul 2024 | 124 | 30 | 1 | 0 | UA |
| Jun 2024 | 120 | 25 | 0 | 0 | UA |
| May 2024 | 124 | 14 | 0 | 0 | UA |
| Apr 2024 | 120 | 13 | 0 | 0 | UA |
| Mar 2024 | 124 | 20 | 0 | 0 | UA |
| Feb 2024 | 116 | 3 | 1 | 0 | UA |
| Jan 2024 | 124 | 25 | 4 | 0 | UA |
Cancellation Rate
0.8%
24 of 3,044 flights
Diversion Rate
0.1%
2 of 3,044 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
Origin airport →IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
Destination airport →Compare the two airports
See BOS and IAD side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to BOS–IAD.
Routes with a similar on-time rate
What the Data Says About BOS to IAD
Boston to Washington (BOS to IAD) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85% on-time rate across 7,615 flights, with delays that do happen averaging 78.4 minutes. The corridor runs roughly 413 miles and is served by 9 carriers. Over the most recent 24 months, 24 of 3,044 flights were cancelled (0.8%) and 2 diverted (0.1%).
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 97% on-time, while Jul 2025 came in at just 73% - a 25-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from BOS to IAD? ▼
What is the cancellation rate for BOS to IAD? ▼
How far is the flight from BOS to IAD? ▼
When is the best time to fly from BOS to IAD? ▼
Flight Guides
Tips and data-driven advice for choosing reliable routes.
Explore PlainFlights
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.