---
kind: "section"
citation: "14 C.F.R. § 121.637"
title: "14"
number: "121.637"
heading: "Takeoffs from unlisted and alternate airports: Domestic and flag operations."
url: "https://uscodex.org/cfr/14/121.637"
---

# §121.637. Takeoffs from unlisted and alternate airports: Domestic and flag operations.

- (a) No pilot may takeoff an airplane from an airport that is not listed in the operations specifications unless—
  - (1) The airport and related facilities are adequate for the operation of the airplane;
  - (2) He can comply with the applicable airplane operating limitations;
  - (3) The airplane has been dispatched according to dispatching rules applicable to operation from an approved airport; and
  - (4) **The weather conditions at that airport are equal to or better than the following—**
    - (i) **Airports in the United States.** The weather minimums for takeoff prescribed in [part 97](/cfr/14/part97.md) of this chapter; or where minimums are not prescribed for the airport, 800-2, 900-1 1/2, or 1,000-1.
    - (ii) **Airports outside the United States.** The weather minimums for takeoff prescribed or approved by the government of the country in which the airport is located; or where minimums are not prescribed or approved for the airport, 800-2, 900-1 1/2, or 1,000-1.
- (b) No pilot may take off from an alternate airport unless the weather conditions are at least equal to the minimums prescribed in the certificate holder's operations specifications for alternate airports.

## Notes

### Amendments

[Docket 6258, 29 FR 19222, Dec. 31, 1964, as amended by Amdt. 121-33, 32 FR 13912, Oct. 6, 1967; Amdt. 121-253, 61 FR 2615, Jan. 26, 1996]

### Source

Source: Docket 6258, 29 FR 19222, Dec. 31, 1964, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 106(f), 40103, 40113, 40119, 41706, 42301 preceding note added by Pub. L. 112-95, sec. 412, 126 Stat. 89, 44101, 44701-44702, 44705, 44709-44711, 44713, 44716-44717, 44722, 44729, 44732; 46105; Pub. L. 111-216, 124 Stat. 2348 (49 U.S.C. 44701 note); Pub. L. 112-95, 126 Stat. 62 (49 U.S.C. 44732 note); Pub. L. 115-254, 132 Stat. 3186 (49 U.S.C. 44701 note).

### Amendments

[Docket 6258, 29 FR 19222, Dec. 31, 1964, as amended by Amdt. 121-33, 32 FR 13912, Oct. 6, 1967; Amdt. 121-253, 61 FR 2615, Jan. 26, 1996]