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Route · LAX → IAD · 2020–2025 BTS data

Los Angeles to Washington

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), LAX to IAD (Los Angeles to Washington) ranks #859 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

86.6%
On-time
+7.6 pts
vs US avg
64 min
Delay when late
12,545
Flights
#859 of 4927
Corpus placement

Cancelled

0.8%

Best Month

Oct 2025 96%

Worst Month

Jul 2025 72%

Distance

2,288 mi

Carriers

6

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 215 29 1 1 UA
Nov 2025 198 32 0 0 UA
Oct 2025 202 8 2 0 UA
Sep 2025 174 14 1 1 UA
Aug 2025 198 26 1 1 UA,AS
Jul 2025 221 62 3 4 AS,UA
Jun 2025 228 39 0 4 AS,UA
May 2025 253 32 0 0 AS,UA
Apr 2025 242 19 0 0 UA,AS
Mar 2025 205 24 0 0 AS,UA
Feb 2025 145 18 1 0 UA
Jan 2025 161 25 3 0 AS,UA
Dec 2024 230 49 2 0 AS,UA
Nov 2024 229 20 1 0 UA,AS
Oct 2024 240 23 0 0 UA,AS
Sep 2024 215 14 0 0 UA,AS
Aug 2024 235 37 3 5 AS,UA
Jul 2024 248 53 5 0 AS,UA
Jun 2024 236 30 3 1 AS,UA
May 2024 244 26 0 0 AS,UA
Apr 2024 231 18 0 1 AS,UA
Mar 2024 215 47 0 1 AS,UA
Feb 2024 147 27 1 0 AS,UA
Jan 2024 146 35 12 0 AS,UA

LAX–IAD seasonal on-time pattern

Best: April (91.2%) · weakest: July (76.7%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 81.8%

Strongest calendar month

April

91.2% on-time · ~184 flights/mo

Busiest calendar month

March

~201 flights/mo avg

Weakest calendar month

July

76.7% on-time · ~177 flights/mo

Cancellation Rate

0.8%

39 of 5,058 flights

Diversion Rate

0.4%

19 of 5,058 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

LAX - Los Angeles

Full on-time, delay-cause, and seasonal performance for Los Angeles, CA.

LAX on-time profile

IAD - Washington

Full on-time, delay-cause, and seasonal performance for Washington, DC.

IAD on-time profile

Compare the two airports

See LAX and IAD side by side on delays, cancellations, and reliability.

Compare LAX vs IAD

Origin-hub reliability standing

Among LAX's stronger departures

LAX → IAD posts a 86.6% on-time rate, landing in the ≥85% band with 40 of 80 BTS-tracked routes leaving Los Angeles. The same hub also shows 39 mid-band and 1 challenged departures · fleet-wide on-time rank #739 of 4927 (highest on-time = #1).

What the Data Says About LAX to IAD

Los Angeles to Washington (LAX to IAD) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 86.6% on-time rate across 12,545 flights, with delays that do happen averaging 63.5 minutes. The corridor runs roughly 2,288 miles and is served by 6 carriers. Over the most recent 24 months, 39 of 5,058 flights were cancelled (0.8%) and 19 diverted (0.4%).

The monthly split is wide on this route: Oct 2025 posted the strongest performance at 96% on-time, while Jul 2025 came in at just 72% - a 24-point swing worth factoring into travel timing.

On the multi-year calendar, LAX–IAD peaks in April at 91.2% on-time while March carries the heaviest traffic (~201 flights per month) ; the softest month is July at 76.7%, a 14.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does LAX to IAD rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, LAX to IAD ranks #859 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from LAX to IAD? ▼
Flights from Los Angeles to Washington have a 86.6% on-time rate based on 12,545 flights. The average delay is 63.5 minutes. The best recent month was Oct 2025 with 96% on-time.
What is the cancellation rate for LAX to IAD? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (39 of 5,058 flights) and 0.4% were diverted.
How far is the flight from LAX to IAD? ▼
The flight distance from Los Angeles (LAX) to Washington (IAD) is approximately 2,288 miles. This route is served by 6 carriers.
When is the best time to fly from LAX to IAD? ▼
The best recent month for on-time performance was Oct 2025 (96% on-time). The worst was Jul 2025 (72% on-time). Consider booking during months with historically better performance.

Airports on this route

LAX Airport

Los Angeles
IAD Airport

Washington
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.

Using LAX–IAD data

LAX–IAD runs 7.6 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare LAX and IAD airport profiles: delay causes and top routes differ even on the same corridor. LAX airport
  • If your dates flex, April (91.2% on-time) beats July (76.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 86.6% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

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.