"Should they have to pay for the mistakes of their employees? I don't know, but it would cause some uproar if they didn't," Hobica said. "They could face a hefty fine if they don't honor the prices ... the fine may have been cheaper than the cost of the mistaken flights."
Kristen Lich, a college professor and mother of three, was able to snag five round-trip tickets (for two adults and three children) from Chicago to Idaho for a total of $242—the cost of the trip is normally nearly 10 times that price.
"My brother lives in Idaho, so every couple of weeks I look to see how much the tickets cost, and it's usually $500 or more," Lich said. "My husband and I would never be able to buy these tickets for all five of us at regular price."
(Watch: On-time flights: Hawaiian, Delta and Alaska top list)
Lich said she also spotted flights from Raleigh, N.C., to Maui, Hawaii, for just $180, but by the time she was ready to purchase the tickets the glitch had been fixed and the flight was listed at around $1,800.