Starting May 22, 2025, you can fly nonstop between the cities on Sundays and Thursdays.
The service is expected to last until mid-August 2025.
Fresno Airport officials hope this service will encourage more families to fly into the Central Valley for summer outdoor adventures, including visits to Yosemite, Sequoia and Kings Canyon National Parks.
Allegiant's service will compete with Alaska Airlines, which already operates year-round between Fresno and Portland, Oregon.
Allegiant announced the flight as part of 44 new nonstop routes, which the airline says tied a record for the largest expansion in its company history.
The airline also offers nonstop flights from Fresno to Las Vegas.
Tickets for Portland flights are already available for sale online.