Dallas/Fort Worth International Airport (DFW) offers several lounges that may be accessible to Frontier Airlines passengers, providing a comfortable and relaxing environment before their flights. While Frontier Airlines itself does not operate exclusive lounges, here are some options available at Frontier Airlines DFW Terminal:

1. The Centurion Lounge: This American Express club is located in Terminal D and has free food and drink, cozy seats, fast Wi-Fi, and private workstations, among other features. Platinum and Centurion cardholders of American Express as well as some other qualified passengers can gain access.

2. Admirals Club: The Admirals Club lounges are accessible in Terminals A, B, C, and D and are run by American Airlines. These lounges include facilities including comfortable seats, alcoholic and non-alcoholic drinks, snacks, and Wi-Fi. American Airlines Admirals Club members, qualifying AAdvantage credit cardholders, and qualifying travelers can gain access.

3. United Club: United Club, which is housed in Terminal E, provides conveniences including Wi-Fi, refreshments, snacks, and cozy seats. United Airlines Club members, some United co-branded credit cardholders, and eligible travelers can gain access.

4. Delta Sky Club: Terminal E offers access to Delta Sky Club lounges, which are run by Delta Air Lines. In addition to refreshments and drinks, they provide Wi-Fi and cozy seating. Travelers with qualifying status, Delta Sky Club members, and some Delta co-branded credit cardholders can gain access.

5. Priority Pass Lounges: At DFW Airport, there are several lounges where Priority Pass holders are accepted. Although the amenities offered by these lounges vary, members typically have access to Wi-Fi, refreshments, beverages, and comfy seating.

Access to these lounges may vary based on the airline you're flying with, your travel class, membership status, or through paid access. Frontier Airlines Terminal DFW passengers can inquire about lounge access options at the airport or check their eligibility through their airline's policies or third-party lounge access programs like Priority Pass.