Construction at San Francisco International is slowing down operations and causing a headache for travelers going through the airport. On September 7th, SFO closed down two of its runways for 20 days for critical repair work to runway 28L. With only two runways now operational at the airport, the rate of cancellations and delays has spiked.

Read more: https://www.forbes.com/sites/grantmartin/2019/09/15/american-delta-and-united-issue-travel-waivers-to-san-francisco-international-airport-due-to-construction-slowdowns/#55fff26b6cd3