FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Atkinson Graham W   2. Issuer Name and Ticker or Trading Symbol UAL CORP /DE/ [UAUA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) __X__ Other (specify below) EVP - President Mileage Plus (Last) (First) (Middle) P.O. BOX 66100 - HDQLD 3. Date of Earliest Transaction (Month/Day/Year) 04/01/2010 (Street) CHICAGO, IL 60666 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 04/01/2010   M   8,600 A $ 0 (1) 33,310 D   Common Stock 04/01/2010   D   8,600 D $ 19.55 (1) 24,710 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Stock Units

(1)

04/01/2010

M

8,600

(2)

(2)

Common Stock

8,600

(1)

17,200

D

Restricted Stock Units

(3)

04/01/2010

A

25,300

(4)

(4)

Common Stock

25,300

$ 0 (1)

25,300

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Atkinson Graham W P.O. BOX 66100 - HDQLD CHICAGO, IL 60666				EVP - President Mileage Plus

Signatures

/s/ Lydia J. Mathas for Graham Atkinson		04/05/2010
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Reflects the vesting and settlement of restricted stock units. Each restricted stock unit represented the economic equivalent of one share of common stock and was settled in cash upon vesting at the sole discretion of the Human Resources Subcommittee of the UAL Board of Directors.
(2)	On April 1, 2010, one third of the restricted stock units granted on April 1, 2009 vested.
(3)	Each restricted stock unit represents the economic equivalent of one share of common stock and may be settled in cash or common stock upon vesting at the sole discretion of the Human Resources Subcommittee of the UAL Board of Directors
(4)	The restricted stock units vest in three equal annual installments beginning on April 1, 2011, contingent upon the Company achieving the Performance Goals for the applicable Performance Period (as defined in the 2008 Incentive Compensation Plan).

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