Not all airports are created equal. Some are routinely congested, understaffed, or poorly designed for connections. Here’s what to expect at the busiest and most challenging U.S. airports — and how to cope.
Wait times and airport rankings fluctuate based on season, staffing, construction, and flight volume. Information on this page reflects general historical patterns. Always check the TSA wait time app or your airline’s app for real-time conditions before you travel.
The Notorious Ones
U.S. Airports Known for Long Waits & Delays
These airports consistently rank among the most congested and delay-prone in the country. If you fly through them, plan accordingly.
Chicago O’Hare International (ORD)
One of the busiest airports in the world and consistently one of the most delay-prone. O’Hare is a major hub for both United and American Airlines, which means when weather hits — and Chicago weather hits often — delays cascade across the entire national air traffic system. Security lines at ORD can exceed 45 minutes during peak hours even with TSA PreCheck. Allow at least 2.5 hours for domestic flights, 3.5 for international. Construction and terminal renovations have added additional congestion in recent years.
John F. Kennedy International (JFK) — New York
JFK is notorious for terminal fragmentation — its terminals are operated by different airlines and are not all connected internally, meaning a connection between terminals often requires exiting security, taking an AirTrain, and re-clearing security. Never book a connection under 90 minutes at JFK. International arrivals face long customs and immigration lines. The airport is undergoing a major multi-year renovation which has improved some areas but created additional congestion in others.
LaGuardia Airport (LGA) — New York
LaGuardia has historically been one of the most delay-prone airports in the U.S. due to its single runway configuration and proximity to JFK and Newark — when weather affects the New York metro area, all three airports back up simultaneously. The new Terminal B has dramatically improved the passenger experience, but the fundamental air traffic constraints remain. Avoid tight connections and early morning departures if possible.
Los Angeles International (LAX)
LAX handles over 75 million passengers per year and its layout — a central terminal area with separate terminals requiring roadway transit between them — creates significant connection challenges. Security lines at LAX can be extremely long, particularly at Terminal 1 (Southwest) and the international terminals. The new automated people mover (APM) has improved inter-terminal connections but the airport remains one of the most congested in the country. Allow 2.5 hours minimum for domestic, 3.5 for international.
Miami International (MIA)
Miami is a major international gateway — particularly for Latin America and the Caribbean — which means customs and immigration lines on international arrivals can be extremely long. Peak periods (spring break, holiday weekends) can see waits of 60–90 minutes through customs even with Global Entry. Domestic security is generally manageable but the airport is large and distances between gates are significant. Factor in extra time for any connection involving an international arrival.
Newark Liberty International (EWR) — New Jersey
Newark is United’s primary East Coast hub and one of the most delay-prone airports in the U.S. due to air traffic control staffing issues and its position in the congested New York airspace. EWR ranks among the worst airports for on-time performance year after year. Terminal A has been recently renovated, but the fundamental air traffic issues persist. If you have a choice between EWR and JFK for a United flight, check delay statistics for your specific route before booking.
Philadelphia International (PHL)
Philadelphia is an American Airlines hub with a compact layout that contributes to gate conflicts and ground delays. PHL consistently ranks among the bottom airports for on-time performance, particularly in summer. Afternoon thunderstorms frequently cause ground stops that cascade into evening delays. Security lines are generally manageable but can spike during peak periods. The airport has limited lounge options relative to its size.
Better Alternatives
Airports Worth Going Out of Your Way For
If you have flexibility in routing, these airports consistently deliver a smoother, faster experience.
Dallas Love Field (DAL)
Southwest’s home base is compact, efficient, and almost always faster than DFW for domestic travel within Southwest’s network. Security lines are short, the terminal is single-level and easy to navigate, and the airport rarely experiences the cascading delays that affect DFW. If Southwest flies your route, DAL is often the better choice over DFW.
Salt Lake City International (SLC)
SLC’s new terminal (opened 2020) is one of the most modern and efficient in the country. Security is fast, the terminal is well-designed, and the airport punches well above its size in terms of passenger experience. A great connecting airport for Delta flights to the West Coast.
Indianapolis International (IND)
Consistently rated one of the best mid-size airports in the U.S. for ease of use, security speed, and overall passenger experience. If your itinerary allows a connection through Indianapolis, it’s a stress-free option.
Portland International (PDX)
Regularly wins awards for passenger satisfaction. Great local food and beverage options, efficient security, and a manageable layout. A pleasant connecting airport for West Coast itineraries.
Tips for Surviving Busy Airports
How to Cope at Congested Airports
Get TSA PreCheck and CLEAR before traveling to these airports
Both programs provide the most benefit at exactly the airports with the longest standard security lines. If you regularly fly through ORD, JFK, LAX, or MIA, PreCheck and CLEAR are essential — not optional. See our guides on TSA PreCheck and CLEAR.
Use the TSA Wait Times app
The official TSA app shows real-time security wait times by checkpoint at major airports. Check it before leaving for the airport so you know which checkpoint to use and how much buffer you need. Available for free on iOS and Android.
Book early morning flights when possible
The first flights of the day have the lowest delay rates. Planes are already at the gate, crews are rested, and weather disruptions haven’t had time to cascade through the system yet. The 6am flight is painful to wake up for but almost always departs on time.
Never book the minimum connection time the airline allows
Airlines set minimum connection times based on ideal conditions. At ORD, JFK, LAX, or MIA, ideal conditions are rare. Add at least 30–45 minutes to whatever the airline considers the minimum, and consider 90 minutes at airports requiring terminal changes. A missed connection at a busy hub can mean a 4–6 hour wait for the next available flight.
Use the lounge during long layovers
If you’re stuck with a 2+ hour layover at a congested airport, a lounge makes the wait dramatically more comfortable. See our guide on how to get lounge access — many travelers don’t realize they already have access through a credit card they already carry.
Disclaimer
Airport wait times, delay statistics, and terminal configurations change frequently due to construction, staffing changes, and operational factors. Information on this page reflects general historical patterns and may not reflect current conditions. Always check real-time wait times via the TSA app or your airline’s app before traveling. FrequentFliers.com is not affiliated with any airport or airline referenced on this page.