[saucerful]

ORD to HNL 12/28 to 1/5.

Hipmunk: $1092. Kayak: $917.

(Both reservations have one layover in each direction and include tax. Kayak sends me to United.com directly while Hipmunk takes me to Orbitz.)

[michaelfairley]

Edit: This is not actually true. I stand corrected.

The Kayak number doesn't include fees and taxes, whereas the Hipmunk number does.

[saucerful]

Nope, from the the footnote: "Prices are per person and are for e–tickets and include all taxes & fees in USD."

[goldfish]

Possibly due to a fare update happening around the time you did the search. When I do that search on Hipmunk I see a lowest fare of $899 (http://www.hipmunk.com/#!ORD_HNL,Dec28_Jan05@0,0) for a one-stop flight in each direction. Kayak's price is the same for the same itinerary.

Admittedly Kayak has one flight for $870 and a few for $896, but they involved two stops.