Flight Check

IAD Airport Complaints — Which Airlines Have the Most Issues

Complaint rates for 7 airlines operating at Washington Dulles International in Washington.

Weighted Avg Rate

6.6/100K

Airlines Tracked

7

Top Issue

Flight Problems

vs. Industry

20% below

Airline Complaint Rates at IAD

Ranked by DOT complaint rate per 100,000 passengers. Rates reflect each airline's nationwide complaint data, contextualized by their presence at Washington Dulles International.

1Frontier Airlines(F9)
23.2/100K
5,879 total complaintsTop issue: Refunds
2Allegiant Air(G4)
8.3/100K
1,662 total complaintsTop issue: Flight Problems
3American Airlines(AA)
7.9/100K
12,808 total complaintsTop issue: Baggage
4United Airlines(UA)
6.9/100K
11,156 total complaintsTop issue: Flight Problems
5Delta Air Lines(DL)
4.1/100K
7,139 total complaintsTop issue: Flight Problems
6Alaska Airlines(AS)
2.5/100K
1,828 total complaintsTop issue: Customer Service
7Southwest Airlines(WN)
1.5/100K
3,165 total complaintsTop issue: Baggage

Source: DOT Air Travel Consumer Report, 2024. Rates are nationwide per-airline figures.

Monthly Complaint Trend at IAD (2024)

7.2
Jan
6.2
Feb
6.2
Mar
6.2
Apr
6.2
May
7.3
Jun
7.4
Jul
7.4
Aug
6.2
Sep
6.2
Oct
6.2
Nov
7.4
Dec

Weighted average complaint rate per 100K passengers by month. Red bars exceed the industry average (8.2).

Top Complaint Categories at IAD

Flight Problems75%
Customer Service17%
Baggage6%
Refunds1%

Weighted by airline flight volume at IAD. Categories reflect the most frequently reported issue type for each airline.

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Frequently Asked Questions

Which airline gets the most complaints at IAD?

Frontier Airlines has the highest complaint rate among airlines operating at Washington Dulles International at 23.2 per 100,000 passengers. However, complaint rates reflect the airline's nationwide performance, not issues specific to IAD.

What is the overall complaint environment at IAD?

The weighted average complaint rate for airlines at Washington Dulles International is 6.6 per 100K passengers, which is 20% below the industry average of 8.2 per 100K. The most common complaint category is flight problems.

How do I file a complaint about an experience at IAD?

If your complaint is about an airline, file with the DOT at airconsumer.dot.gov or use Flight Check's Disruption Desk (flightcheck.live/disruption-desk) to generate a complaint letter and check what you're owed. For airport facility issues (parking, terminals, security lines), contact the airport authority directly.

Does IAD cause more airline complaints than other airports?

Airport-level complaint data from the DOT is reported by airline, not by airport. The data shown here reflects the complaint rates of airlines that operate at IAD, weighted by their flight volume. Airports with more low-cost carriers tend to have higher aggregate complaint rates.

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Source: DOT Air Travel Consumer Report, January–December 2024. Complaint rates are per-airline nationwide figures weighted by flight volume at IAD.