One more post about Allegiant Air, the Las Vegas-based carrier that's launching a nonstop from Spokane to Honolulu in January.

If I were designing a cool website that took all the guesswork out of how much passengers have to pay when taking a flight, I'd hope to come up with something like NerdWallet has.

It's especially helpful in detailing exactly how assorted fees and costs will be added to your fare. Using interactive features to modify the number of bags, NerdWallet sweetly totals the final cost by tracking what happens if you purchase more than or less than 30 days in advance, whether you buy online or by phone, and how many bags you check.  

It doesn't, as far as we can tell, detail the airport fees and taxes that are also added.

NerdWallet'sr Allegiant fee page works wonders: http://www.nerdwallet.com/travel/allegiant-air

For instance, it shows if you're flying on Allegiant and have 2 checked bags both under 40 pounds, that will  add $140.

If you ask what the price will be if both are 44 pounds (exceeding the 40-pound threshhold), that will add another $100.

Check it out.  

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