Delta says it is now making this no change fee policy permanent for tickets purchased for travel within the U.S.

Delta said the elimination of change fees is effective immediately and includes tickets purchased for travel within the domestic U.S., Puerto Rico and U.S. Virgin Islands in Delta’s First Class, Delta Premium Select, Delta Comfort+ and Main Cabin, with the exception of Basic Economy tickets.

In addition, Delta will extend its waiver on change fees for newly purchased flights, including international flights and Basic Economy fares, through the end of the year and will extend its expiration on travel credits through December 2022 for tickets booked before April 17, 2020

United Airlines is permanently getting rid of change fees on all standard Economy and Premium cabin tickets for travel within the US, Puerto Rico and US Virgin Islands, effective immediately. There is no limit to the number of changes made per flight, but customers must still pay any fare difference. Basic Economy tickets are excluded, as changes to those tickets have never been allowed except during COVID-19 or within 24 hours of ticket purchase. International flights, which carry higher change fees, are also excluded. The change fees on international flights vary by destination.

United also said it would extend its waiver for new tickets issued through December 31, 2020, permitting unlimited changes with no fee. The change will apply to all ticket types purchased after March 3, 2020, and is valid for domestic and international travel. For previously booked tickets, original change fees will apply.

Additionally, beginning January 1, 2021, any United customer can fly standby for free on a flight departing the day of their travel regardless of the type of ticket or class of service, while MileagePlus Premier members can confirm a seat on a different flight on the same day with the same departure and arrival cities as their original ticket if a seat in the same ticket fare class is available.

American said change fees for all domestic and short-haul international flying on Premium Cabin fares and most Main Cabin fares will be eliminated (though not on the cheapest Basic Economy fare. All customers also will have the ability to fly standby on earlier flights for the same destination on the same day at no charge starting Oct. 1, 2020.

American also said Basic Economy fares will now come with the ability to tailor the travel experience, including upgrades, Preferred and Main Cabin Extra seats, and priority boarding and same-day flight changes. AAdvantage elite members will be able to apply their current travel benefits on all tickets, including when purchasing a Basic Economy fare.