Frontier Airlines Flight Attendant Fills Water Bottles From Plane’s Tank… But Why?

A Frontier Airlines passenger recorded a flight attendant filling bottles of water with the plane’s tank water. That’s sort of gross, so the video of this is going viral. But the big question is what actually happened with the water in those bottles, though. I’m not writing about this to generate clickbait, but I’m genuinely curious if the airline has a policy on this, or what I’m missing…

Some gross “bottled water” on Frontier Airlines

An X user posted a 43-second clip showing a Frontier flight attendant filling up large bottles of Crystal Geyser water with water from the plane’s tanks. This apparently took place on September 25, 2026, on Frontier flight F92342, operating from Los Angeles (LAX) to Denver (DEN).

The bottles are being filled with water from the plane’s tanks. Generally speaking, the tank water on airplanes isn’t particularly clean, and it’s not advisable to drink it. In the past we’ve seen some studies about the quality of tank water on planes, and the findings are pretty grim.

Admittedly this water is also used for coffee and tea, but that also involves making the water hot enough so that it kills a lot of bacteria. I know many people don’t drink airplane coffee because of the water quality (among other things), though we’re all different on that front.

Is this water being served to passengers, or…?

One might logically assume that these bottles of water were being filled so that they could be used for the inflight service. If that’s the case, that’s of course problematic a) because the water is kind of gross and b) because it’s being passed off as one thing, when it’s really another. You don’t pour Korbel out of a Dom Perignon bottle (not that Crystal Geyser is Dom Perignon, but you get my point).

But here’s the part that confuses me. Frontier has a buy on board menu, and for most passengers, all drinks, including bottled water, need to be purchased. On Frontier you can buy a bottle of purified drinking water for $4.29.

Now, this is where it gets interesting. Officially (at least based on any published policies I can find), Frontier doesn’t seem to offer complimentary water, unless there’s a delay that gets long enough where the DOT mandates it. However, online reports suggest that if you ask, they’ll give you a cup of ice, or a cup of hot or cold water.

Is that actually the case, and if so, is the reality simply that the water comes from the plane’s tanks? And if so, is it standard to pour the water into bottles that look like they’re purified or spring water, rather than just airplane tank water?

Bottom line

A Frontier Airlines flight attendant was caught on video filling water bottles with water from the plane’s tanks. I suppose there are uses for those bottles of water other than direct consumption by humans, but I do find this to be confusing.

The airline doesn’t offer complimentary water as a standard, but instead, it has to be purchased. However, reports suggest that if you ask, the airline will offer a complimentary cup of water. So is it standard for the cups of water to actually come from the tank, or…?

What do you make of this Frontier bottled water situation?