Travel between now and June 12. There is a 14-day advance purchase.
Here are some more Alaska Airlines discounts for travel to/from Fairbanks:

Fairbanks-Los Angeles  $623
Fairbanks-Chicago  $617
Fairbanks-Seattle  $578
Fairbanks-Portland $599
Fairbanks-San Francisco  $622
Fairbanks-San Diego  $621
Fairbanks-Phoenix  $623
Fairbanks-Las Vegas  $620
Fairbanks-Denver  $621

Remember: all fares around roundtrip and include all those pesky surcharges and taxes. USTravel’s $38 ticketing fee is additional. Call them toll-free: (800) 622-6449. They helped me dig up these fares.

To and from Anchorage, the fares are a little less. Laura and the crew and USTravel’s Anchorage office are working overtime to get the latest info on these Spring specials.
Anchorage-Portland $497
Anchorage-Redmond/Bend 517
Anchorage-Medford 517
…and other cities in Oregon like Eugene, North Bend and Pendleton
Anchorage-Boise 517
Anchorage-Reno 537
Anchorage-Kalispell, MT 537
Anchorage-Great Falls, MT 537
…and other cities in Montana like Butte, Bozeman, Billings and Helena
Anchorage-Phoenix 537
Anchorage-Salt Lake City 508
Anchorage-Denver 508
Again, all fares include taxes, surcharges and government fees. USTravel’s $38 ticketing fee is additional.

Call USTravel in Anchorage (800)544-2217 or (907)561-2434 or Fairbanks (800)622-6449. Stay tuned for more sale rates. Already, we’ve seen the travel dates pushed into mid-June. Watch for more cities.