<PAGE>

                                                                EXHIBIT 10.18(g)

                              NEXTEL PARTNERS, INC.
                             STOCK OPTION AGREEMENT
                                 (BOARD MEMBER)

            STOCK OPTION AGREEMENT, dated as of ___________, ______, between
Nextel Partners, Inc., a Delaware corporation (the "Company"), and ________, a
member of the Board of Directors of the Company (the "Optionee").

            WHEREAS, the Company has adopted the 1999 Nonqualified Stock Option
Plan (the "Plan") initially effective as of January 29, 1999 and as amended and
restated as of May 15, 2000 and as amended thereafter from time to time, a copy
of which has been provided to the Optionee;

            WHEREAS, the committee of the Board of Directors of the Company
responsible for administering and making grants under the Plan, with the
Optionee abstaining therefrom, has determined that the Optionee is eligible to
receive, and should receive as an inducement to serve on the Company's Board of
Directors, options to purchase shares of the Company's Class A Common Stock, par
value $.001 per share (the "Shares"), subject to the Plan and the terms set
forth herein (the "Option");

            WHEREAS, if the Optionee is a Director of the Company, the grant of
said Option has been approved with the Optionee abstaining from voting;

            NOW, THEREFORE, in consideration of the mutual covenants herein
contained and other good and valuable consideration, receipt of which is hereby
acknowledged, the parties hereto do hereby agree as follows:

            1. Definitions. To the extent any capitalized words used in this
Agreement are not defined, they shall have the definitions stated for them in
the Plan. As used herein, the following terms shall have the following meanings
set forth below:

            "Cause" means (i) the Optionee's conviction of a felony evidencing
criminal dishonesty or moral turpitude, (ii) a willful and material breach of
the Optionee's duty of loyalty to the Company or any of its Subsidiaries or
(iii) after 20 business days following the Optionee's receipt of a written
notification from the Company specifying the particulars in reasonable detail,
the Optionee's failure to comply with or to cure, as applicable, a willful and
material breach of the Optionee's fiduciary duty or duty of due care to the
Company.

                                                                               1
<PAGE>

            "Change in Control of the Company" means the occurrence of any of
the following events:

            (a) any person or group (as such terms are used in Sections 13(d)
      and 14(d) of the Exchange Act and the regulations thereunder) (i) is or
      becomes the Beneficial Owner of more than 50% of the total Voting Stock or
      Total Common Equity of the Company, or (ii) otherwise has the power to
      direct the management and policies of the Company, directly or through one
      or more intermediaries, whether through the ownership of voting
      securities, by contract or otherwise, except that no change of control
      will be deemed to have occurred under this clause (ii) as a result of
      customary rights granted (A) in any indenture, credit agreement or other
      agreement for borrowed money or (B) to holders of non-convertible,
      mandatorily redeemable, preferred stock unless and until action occurs
      that would otherwise cause a "Change in Control of the Company" as herein
      defined, provided that such rights were granted pursuant to a transaction
      in the financial markets and not as part of a strategic alliance or
      similar transaction;

            (b) the Company sells, assigns, conveys, transfers, leases or
      otherwise disposes of all or substantially all of its assets to any Person
      (other than to a direct or indirect wholly owned subsidiary of the
      Company);

            (c) the Company, directly or indirectly, consolidates with, or
      merges with or into, another Person, or any Person, directly or
      indirectly, consolidates with, or merges with or into, the Company, and
      pursuant to such transaction (or series of transactions) either: (i) the
      outstanding Voting Stock of the Company is converted into or exchanged for
      cash, securities or other property, but excluding a transaction (or series
      of transactions) where (A) the outstanding Voting Stock of the Company is
      converted into or exchanged for Voting Stock of the surviving or
      transferee Person and (B) the holders of Voting Stock of the Company
      immediately preceding such transaction receive more than 50% of the total
      Voting Stock and Total Common Equity of the surviving or transferee Person
      in substantially the same relative proportions as such holders had prior
      to such transaction; or (ii) new shares of Voting Stock of the Company are
      issued so that immediately following such transaction, the holders of
      Voting Stock of the Company immediately preceding such transaction own
      less than 50% of the Voting Stock and Total Common Equity of the surviving
      Person; or

            (d) during any period of two consecutive years following the date
      hereof, individuals who at the beginning of such period constituted the
      board of directors of the Company (together with any directors who are
      members of the board of directors of the Company on the date hereof, and
      any new directors whose election by such board of directors or whose
      nomination for election by the stockholders of the Company was approved by
      a vote of 66-2/3% of the directors then still in office who were either
      directors at the beginning of such period or whose election or nomination
      for election was previously so approved) cease for any reason to
      constitute a majority of the board of

                                                                               2
<PAGE>

      directors of the Company then in office; provided, that no change in the
      composition of the Board in connection with the Closing, or by reason of
      any substitution of one director for another so long as both directors are
      nominated by the same Person, shall constitute a Change in Control of the
      Company for purposes of this paragraph (d).

            Notwithstanding the foregoing, no "Change of Control of the Company"
shall occur (i) merely by reason of any creditor of the Company foreclosing on
or otherwise causing the sale, transfer or other disposition of all or any
substantial part of the Company's assets (including, without limitation, the
Company's equity interests in its subsidiaries) or (ii) merely by reason of a
transfer by Eagle River Investments, LLC ("Eagle River") to another Person of
the Capital Stock of the Company owned by Eagle River so long as Craig O. McCaw
("McCaw") controls (as defined in Section 4.01(h) of the Shareholders'
Agreement) such Person whether or not McCaw owns a majority of the equity
interests of such Person, unless such transfer referred to in this clause (ii),
alone or in conjunction with other transactions, results in the occurrence of an
event of the type described in any of clauses (a), (b), (c) or (d) above.

            "Voting Stock" of any Person means Capital Stock of such Person
which ordinarily has voting power for the election of directors (or persons
performing similar functions) of such Person, whether at all times or only so
long as no senior class of securities has such voting power by reason of any
contingency.

            2. Incorporation of the Plan. All terms and conditions of the Plan
that are consistent with the terms and conditions of this Agreement are hereby
incorporated into this Agreement by reference and shall be deemed to be part of
this Agreement, without regard to whether such terms and conditions are not
otherwise set forth in this Agreement. Further, for all purposes hereof, and
unless the context provides otherwise, any reference in this Agreement to the
"Company" shall be deemed to refer to the Company or a Subsidiary, as the case
may be.

            3. Grant of Option. In consideration of the Optionee's willingness
to serve and service on the Company's Board of Directors, and for other good and
valuable consideration, the Company hereby irrevocably grants to the Optionee as
of _____________, ______ the Option to purchase up to ________ Shares upon the
terms and conditions set forth in the Plan and this Agreement.

            4. Purchase Price. The purchase price of each Share covered by the
Option shall be $_____, without commission or other charge, subject to
adjustment as provided in Section 2.3 of the Plan.

            5. Vesting.

            (a) Ordinary Vesting. Notwithstanding anything in the Plan to the
contrary, the maximum portion of an Option (expressed as a percentage of such
Option) that shall be exercisable

                                                                               3
<PAGE>

(vested) in whole or in part shall be a function of the Optionee's years of
service on the Board from the date of grant as follows:

            Years of Service                   Exercisable Percentage
            After Grant Date                   of Option

            Less than 1                               0%
            1                                        33%
            2                                        67%
            3                                       100%

            (b) Accelerated Vesting.

            (i) Upon a Change in Control of the Company all of the unvested
Options then held by the Optionee shall vest immediately.

            (ii) Upon termination of the Optionee's membership on the Board of
Directors of the Company on account of death or disability, or because the
Optionee is requested to resign or is not re-elected to serve on the Board of
Directors other than for Cause, all of Optionee's unvested Options shall vest
immediately.

            6. Transferability. The Option granted hereunder may not be
transferred, assigned or otherwise conveyed by the Optionee to any Person;
provided, however, that nothing in this Agreement or the Plan shall prevent (i)
transfers by the Optionee by will or by the applicable laws of descent and
distribution or (ii) transfers by the Optionee to (x) a spouse or lineal
descendant (whether natural or adopted), sibling, parent, heir, executor,
administrator, testamentary trustee, legatee or beneficiary of the Optionee, (y)
any trust, the primary beneficiaries of which, or any corporation, limited
liability company or partnership, the stockholders, members or general or
limited partners of which include only the Persons named in clause (x) or (z)
any charitable remainder trust for the primary benefit of the Optionee.

            7. Notices. Any notice to be given under the terms of this Agreement
to the Company shall be addressed to the Company in care of its Secretary, and
any notice to be given to the Optionee shall be addressed to him/her at the
address given beneath his/her signature hereto. By a notice given pursuant to
this Section 8, either party may hereafter designate a different address for
notices to be given to him/her. Any notice that is required to be given to the
Optionee shall, if the Optionee is then decreased, be given to the Optionee's
personal representative if such representative has previously informed the
Company of his status and address by written notice under this Section. Any
notice shall be deemed duly given when enclosed in a properly sealed envelope or
wrapper addressed as aforesaid, deposited (with postage prepaid) in a post
office or branch post office regularly maintained by the United States Postal
Service.

                                                                               4
<PAGE>

            8. Titles. Titles are provided herein for convenience only and are
not to serve as basis for interpretation or construction of this Agreement.

            9. Construction. This Agreement shall be administered, interpreted
and enforced under the internal laws of the State of Delaware without regard to
its conflict-of-law rules.

            10. Entire Agreement. This Agreement embodies the entire agreement
and understanding of the parties hereto with respect to the subject matter
contained herein and supersedes all prior communications, representations and
negotiations in respect thereto. To the extent that the Option is in
substitution for any prior understandings between the Optionee and the Company,
any and all rights, entitlements or understandings are hereby extinguished and
the Optionee waives any claim to any and all such prior understandings.

            11. Burden and Benefit. This Agreement shall be binding upon, and
shall inure to the benefit of, the Company and the Optionee, and their
respective heirs, personal and legal representatives, successors and assigns.

            12. Specific Performance. Strict compliance by the Optionee shall be
required with each and every provision of the Plan and this Agreement.

            13. Modifications. No change or modification of this Agreement shall
be valid unless the same is in writing and signed by the parties hereto;
provided, however, that the Optionee hereby covenants and agrees to execute any
amendment to this Agreement which shall be required or desirable (in the opinion
of the Company or its counsel) in order to comply with any rule or regulation
promulgated or proposed by the Internal Revenue Service.

            IN WITNESS WHEREOF, this Agreement has been executed and delivered
by the parties hereto as of the date first above written.

                                           NEXTEL PARTNERS, INC.

                                           By  _______________________________
                                           Name:
                                           Title:

                                           ___________________________________
                                           [Optionee]

                                           Address: __________________________

                                                ______________________________

                                           SS#: ______________________________

                                                                               5