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United Airlines

 

1930
No Date
1931
June 15

July 15

Oct 15
1932
Jan 1

April 15

May 1

June 1

July 1
1933
Jan 15

April 15

June 11

June 20

July 1

Sept 1

Dec 17
1934
May 1

June 1

Aug 1

Oct 1

Nov 16
1935
Jan 8

April 4

June 1

July 5

Aug 1

Sept 1 

Oct 1 

Nov 1

Dec 1
1936
March 1

April 1

May 1

June 1

Sept 1

Oct 1

Dec 1
1937
Jan 1

Feb 1

March 1

April 1

May 1

May 15

June 1

July 20

Aug 5

Aug 23

Sept 26

Dec 1
1938
Jan 1

March 1

April 1

April 2

April 24

June 1

July 1

Nov 1

Dec 1
1939
Jan 21

Feb 15

Mar 15

April 1

May 1

June 1

July 1

Aug 15

Sept 24 

Nov 1

Dec 1

psloan@airtimes.com

Updated April 5, 2005
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