SFO Enters Summer with Sharp Increase in Delays: What to Check Before Flying Through San Francisco

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Marta Skylar
Aviation News Editor
28.07.2026 01:17

SFO Enters Summer with Sharp Increase in Delays: What to Check Before Flying Through San Francisco

San Francisco International Airport (SFO) has become one of the most critical summer hubs, where passengers should allow more time for transfers, terminal arrivals, and ground logistics. Recent local aviation analytics data from April to early June showed a noticeable deterioration in punctuality: the average delay time, according to these calculations, increased to approximately 20 minutes compared to about 5 minutes last year, and the share of flights delayed by more than 15 minutes has significantly increased. At the same time, official SFO materials confirm two key risk factors for the summer of 2026: the six-month closure of Runway 1 Right for repairs and capacity restrictions due to rules for using closely spaced parallel runways.

For tourists, this does not mean that the airport is not operating or that trips to California should be canceled. SFO continues to handle international and domestic flights, and the airport itself has simultaneously launched a new Enhanced Passenger Processing process for faster passport control for US citizens. But for passengers with short connections, late arrivals, cruise or hotel bookings after the flight, the news has practical significance: a time buffer in San Francisco this summer has become a normal part of route planning rather than just a precaution.

What Exactly Happened at SFO

San Francisco Airport announced as early as late 2025 that it would close Runway 1 Right from March 30 to October 2, 2026. The work includes resurfacing, improving adjacent taxiways, modernizing lighting, and new markings. According to SFO's official estimate, the repairs themselves were expected to cause delays for less than 10% of flights, usually with an average wait of less than 30 minutes, primarily during peak periods around 09:00 and between 20:00 and 21:00.

However, the summer season showed that the picture for the passenger can be more complex than a separate repair schedule. SFO has two pairs of parallel runways, but they are located very close to each other: approximately 750 feet. In normal weather, the airport can handle about 45 arrivals per hour, but under conditions where aircraft must land more cautiously or effectively in a single stream, capacity drops to approximately 36 arrivals per hour. In such situations, the FAA may use the Ground Delay Program to meter flights into SFO and avoid congestion in the air and on approach.

It is the combination of infrastructure repairs, new or more strictly applied aircraft separation rules, wind, fog, and peak hours that makes SFO sensitive to cascading delays. If one flight is delayed in arriving, the aircraft may depart later for the next sector, the crew may reach their duty time limits, and passengers with a short connection may miss their next flight even when the first delay seemed small.

Why This Is Important for Tourists

SFO is one of the main gateways of the US West Coast for trips to California, Silicon Valley, Northern California wine regions, national parks, and trans-Pacific routes. For many travelers, it is not only a final destination but also a transfer hub between an international flight and a domestic segment to Los Angeles, Las Vegas, Seattle, Honolulu, Portland, or smaller US cities.

The biggest risk in such a situation is underestimating a short connection. Formally, 60-90 minutes between flights may look acceptable in a booking system, but in the summer of 2026, such a buffer for SFO may be too fragile, especially if the first segment arrives during one of the peak intervals or if the passenger needs to go through immigration control, collect baggage, re-check it for a domestic flight, and move to another terminal.

Travelers who are just planning their route should compare not only the ticket price but also the quality of the connection. For international arrivals at SFO, it is more conservative to allow several hours between flights, and for separate tickets, even more, because the airline may not be responsible for a missed next segment if it was purchased in a separate booking. If the flight to San Francisco is the final destination, one should be more careful when planning evening events, long transfers, hotel check-ins with strict arrival times, and prepaid car rentals.

What the New EPP Passport Process Changes

Against the backdrop of flight delays, SFO also announced a positive change for international arrivals: together with U.S. Customs and Border Protection, the airport launched Enhanced Passenger Processing. This is a contactless process for US citizens, in which cameras automatically take photos in the passport control area, and the system compares them with data already in the CBP database. According to SFO, after the national launch of EPP, CBP recorded an average 25% reduction in waiting time for US citizens.

This is an important but not universal advantage. EPP helps specifically at the passport processing stage for a certain category of passengers, and does not solve the problem of a delayed aircraft arrival, waiting for baggage, customs control, moving between terminals, or queues for re-checking suitcases. For foreign tourists, visa holders, passengers with children, people with non-standard documents, or travelers who are referred for additional screening, the actual border crossing time may vary.

That is why passengers should not automatically shorten their connection just because of the launch of EPP. It is better to perceive this change as a potential improvement of one stage of the journey, but plan the route as if the main risk still lies in the flight operational part: runway capacity, weather conditions, arrival schedule, and the accumulation of delays throughout the day.

What to Check Before Flying Through San Francisco

Before your trip, you should start with a basic flight check. If you are flying through San Francisco Airport (SFO), check the status not only in the morning but also a few hours before leaving for the airport. For a quick check of departures and arrivals, the SFO online board will be useful, but final changes, rebooking rules, and delay notifications should always be verified with the airline.

  • If you have an international connection at SFO, avoid minimum connections, especially in the second half of the day and in the evening.
  • If the arrival is late, check hotel check-in and cancellation conditions in advance.
  • If you plan to travel to the city, Silicon Valley, or wine regions after the flight, allow a reserve for baggage collection and ground transport.
  • If you are buying separate tickets, leave a significantly larger interval between flights than with a single ticket.
  • If the trip depends on a cruise, conference, tour, or medical appointment, it is better to arrive a day earlier.

For travelers with an early departure or night arrival, staying overnight near the terminals can be a practical solution. In this case, it is worth reviewing hotels near San Francisco Airport in advance, especially if the flight falls during peak hours or the route includes children, a large amount of luggage, or further travel by car. If you need to get to the city or suburbs quickly after arrival, it is appropriate to compare transfers and taxis from SFO in advance. For trips along the coast, to Napa, Sonoma, or national parks, car rental at San Francisco Airport may be useful, but the time for picking up the car should also not be planned too close to the arrival time.

Who Should Be Especially Careful

Passengers with short connections, families with children, travelers with heavy luggage, tourists after long intercontinental flights, and those flying on separate tickets may be most affected by the increased schedule instability. Also, passengers arriving at SFO in the evening and planning to travel far from the city immediately should be careful: a flight delay of 30-60 minutes can overlap with baggage waiting, transport queues, and fatigue after the flight.

A special category of risk involves routes where SFO is an intermediate point before the last daily flight to a small city. If such a flight is missed, an alternative may only appear the next day. In this case, it is worth checking the airline's rebooking rules, the availability of hotels near the airport, and the existence of insurance coverage for delays and missed connections even before the trip.

Conclusion

SFO remains one of the most convenient and important airports for travel to Northern California, but the summer of 2026 makes it less predictable for connections and precise time planning. The repair of Runway 1 Right until October 2, the capacity restrictions on closely spaced runways, and seasonal peak loads mean that even moderate delays can quickly affect the entire route.

The best strategy for tourists is not to panic, but to plan conservatively: check the flight several times on the day of departure, avoid overly short connections, have a backup plan for the hotel or transfer, and carefully read airline notifications. New technologies at passport control can speed up some arrivals, but they do not replace the time buffer in the route. For travel through San Francisco this summer, an additional 60-120 minutes can be the difference between a calm transfer and a difficult rebooking.